Complete STC 01 April 2026 (2)

Version 5 A-1 1 April 2019 SECTION A: APPLICABILITY OF SECTIONS AND CODE STRUCTURE 1. INTRODUCTION 1.1 This Section A sets out: 1.1.1 the structure of the Code; 1.1.2 the definition of Code Procedures and an explanation of their relationship with other parts of the Code; 1.1.3 provisions relating to publication of and access to the Code; 1.1.4 the relationship of the Code with other documents. 2. STRUCTURE OF THE CODE 2.1 The Code 2.1.1 The Code comprises each of the sub-paragraphs, paragraphs, Parts, Sections, Schedules, and Code Procedures. 2.2 TO Construction Agreements 2.2.1 Each TO Construction Agreement contemplated to be entered into pursuant to Section D, Part Two of this Code shall, unless otherwise agreed between the Parties to such TO Construction Agreement, contain the terms, or contain terms substantially in the same form as, those set out in Schedule Nine. 2.2.2 Each TO Construction Agreement entered into pursuant to Section D, Part Two of this Code and in force from time to time shall constitute a separate agreement governed by the terms of this Code and will be read and construed accordingly. 2.3 Code Procedures 2.3.1 The Code Procedures form a part of the Code and set down processes and procedures that the Relevant Parties consider and agree are appropriate to support their compliance with the rest of the Code. 2.3.2 The Code Procedures shall be those listed in Schedule Two which Schedule shall be updated from time to time in accordance with Section B, paragraph 7.3. 2.3.3 Unless otherwise specified, a reference in other parts of the Code (including, for the avoidance of doubt, in any other Code Procedure) to a Code Procedure shall be deemed to be a reference to the version of that Code Procedure then in force as indicated in the then current version of Schedule Two. 2.3.4 Each Relevant Party shall comply with the Code Procedures where and to the extent that such Code Procedures relate to such Relevant Party. Version 5 A-2 1 April 2019 2.3.5 Code Procedures may be amended and new Code Procedures created in accordance with Section B, paragraph 7.3. 3. ACCESS TO THE CODE 3.1 Subject to paragraph 3.3, a copy of the Code shall be published on the Code Website. 3.2 Notwithstanding paragraph 3.1 and subject always to paragraph 3.3, the Panel Secretary shall provide a copy of the Code (including, for the avoidance of doubt, any Code Procedure) or any past versions of same, to any person on request, which may be subject (other than in the case of the Authority) to payment by such person of a reasonable charge. A reasonable charge shall be an amount not exceeding the reasonable cost to the Panel Secretary of making and providing such copy. 3.3 A Code Procedure, or part(s) thereof, may not be published or otherwise made available to other Parties, any third person or communicated to the public, including by publication on the Code Website or otherwise, where Relevant Parties agree that the disclosure of the contents of such Code Procedure, or part(s) thereof (including, without limitation, names and personal contact details) would substantially prejudice the interests of such Relevant Parties or persons identified therein and have notified the Parties, Panel Secretary and the Authority to this effect. 3.4 The Panel Secretary shall maintain and keep up to date a library of all past and current versions of the Code (including, for the avoidance of doubt, of each Code Procedure). 4. PRECEDENCE 4.1 In the event of any inconsistency between the provisions of a Code Procedure and any other parts of the Code that are not Code Procedures then such other parts of the Code shall prevail. 4.2 In the event of any inconsistency between the provisions of the Code and the provisions of any other document established or adopted under and pursuant to the Code then the provisions of the Code shall prevail. 4.3 In the event of any inconsistency between the provisions of one Code Procedure and another, the Relevant Parties to such Code Procedures as are inconsistent shall agree which provision(s) shall take precedence pending amendment of the Code Procedure(s) as relevant under Section B paragraph 7.3, and such Relevant Parties shall promptly take such steps in accordance with Section B paragraph 7.3 to remove such inconsistency. 4.4 A Party may refer a failure to agree pursuant to paragraph 4.3 to the Authority as a Dispute pursuant to Section H, paragraph 4.1. 4.5 The provisions of this paragraph 4 shall be subject to any express provision to the contrary in any part of the Code not contained in a Code Procedure. Version 26 B-1 24 September 2025 SECTION B: GOVERNANCE 1. INTRODUCTION 1.1 This Section B sets out: 1.1.1 arrangements for admission of Transmission Licensees, Offshore Transmission Owners and Competitively Appointed Transmission Owners as Parties to the Code; 1.1.2 arrangements for withdrawal of Parties from the Code; 1.1.3 arrangements for the establishment and operation of the STC Modification Panel; 1.1.4 arrangements for the appointment of Party Representatives; and 1.1.5 procedures for making amendments to the Code. 2. PARTIES AND PARTY REPRESENTATIVE 2.1 For the purposes of this Code, a "Party" is a person who is, for the time being, bound by the Code by virtue of being a Party to the Framework Agreement; 2.2 For the purposes of this Code, a ‘Party Representative’ is a representative of the Parties, appointed in accordance with paragraph 6.1.2 to act on behalf of them for the purposes of this Section B. 2.3 For the purposes of this Code, a ‘Relevant Party’ is as defined in Section J of this Code. 2.4 For the purposes of the Code, a ‘Relevant Party Representative’ is a representative of the Relevant Parties 3. ADMISSION OF NEW PARTIES 3.1 Accession Procedure for Party Applicants 3.1.1 Only a Party Applicant which is obliged from time to time to enter into the Framework Agreement shall have the right to enter into and be a Party to the Framework Agreement subject to, and in accordance with, the provisions of this paragraph 3. 3.1.2 A Party Applicant shall submit to the Panel Secretary: 3.1.2.1 an application form which is in such form as the Party Representatives may from time to time prescribe, giving its Party Details as at the time of its application, together with any supporting documentation so prescribed; and 3.1.2.2 a written undertaking from the Party Applicant (in the form prescribed in the application form) that the Party Details of such Party Applicant are complete and accurate in all material respects. 3.1.3 Upon receipt of the items referred to in sub-paragraph 3.1.2, the Panel Secretary shall promptly: Version 26 B-2 24 September 2025 3.1.3.1 check that the application form has been duly completed by the Party Applicant and the relevant supporting documentation has been provided and, where necessary, liaise with the Party Applicant in order to ensure that the Party Applicant completes the application form and provides any such supporting documentation required; 3.1.3.2 notify the Authority of the name of the Party Applicant; 3.1.3.3 prepare an Accession Agreement for execution by the Party Applicant; 3.1.3.4 execute and deliver such Accession Agreement on behalf of all Parties to the Party Applicant for execution; 3.1.3.5 send a certified copy of such Accession Agreement, duly executed by the Party Applicant, to the Party Applicant and other Parties; and 3.1.3.6 give notice of the accession of such Party Applicant to the Authority. 3.1.4 Subject to and in accordance with the provisions of this paragraph 3.1, each Party hereby irrevocably and unconditionally authorises the Panel Secretary to execute and deliver an Accession Agreement to a Party Applicant on its behalf and to admit the Party Applicant as a Party. 3.1.5 Accession of a Party Applicant to the Framework Agreement shall be effective on and from the date of the Accession Agreement. 3.2 Party Entry Processes 3.2.1 Following accession to the Framework Agreement under sub-paragraph 3.1.5, a Party Applicant shall be a Party save that the rights and obligations of such Party and the rights and obligations of the other Parties in respect of such Party under Sections C, D, K and paragraphs 2.2 and 3 of Section G of this Code shall not take effect, unless and to the extent it is expressly provided for in this Code or otherwise agreed between the Party Representatives, until the date of notification of completion of the Party Entry Processes (as defined in sub-paragraph 3.2.3 below) for that Party under sub-paragraph 3.2.4. 3.2.2 For the avoidance of doubt, where this Code provides for agreement to be made between the Party Representatives, on acceding to the Framework Agreement, a Party shall be deemed to agree with any and all decisions that have been reached by the Party Representatives prior to the date of the relevant Accession Agreement until such time as the Party Representatives shall otherwise agree. 3.2.3 As soon as reasonably practicable, but in any event not more than 30 days following the accession of a Party to the Framework Agreement under sub- paragraph 3.1.5, each Party and Party Representative shall use their reasonable endeavours to agree the procedures, processes and steps required to be taken by each of the Parties (such agreement not to be unreasonably withheld) such that each Party can comply and continue to comply with its obligations under this Code including any obligations or rights referred to in sub-paragraph 3.2.1 (here referred to as the “Party Entry Processes”) on and from the date of notification of completion of such Party Entry Processes under sub-paragraph 3.2.4. The Party Entry Processes shall include, without limitation, the establishment and testing of communications arrangements, exchange of data, development and amendment of, creation or accession to (as appropriate) Services Capability Specification, Interface Agreements, TO Construction Agreements, Outages Proposals, Transmission Investment Plans and Code Procedures and such Party Entry Processes may be amended as required from time to time upon agreement by the Version 26 B-3 24 September 2025 Party Representatives (such agreement not to be unreasonably withheld). In the case of an Offshore Transmission Owner, the Party Entry Processes shall also include the submission and acceptance of a TO Construction Offer in accordance with Paragraphs 4 and 5 of Section D Part Two of this Code (or, where a User is undertaking OTSDUW Build, the issue by the Offshore Transmission Owner of an OTSDUW Completion Report in accordance with Paragraph 4 of Section D Part Two of this Code). 3.2.4 Each Party shall expeditiously undertake such actions as are required of it under and pursuant to the Party Entry Processes in order to give effect to the timely completion of the Party Entry Processes. Completion of the Party Entry Processes shall be deemed to take effect from the date of notification of such completion by the Panel Secretary to the Authority on behalf of the Parties following agreement by the Party Representatives as to such notice. For the avoidance of doubt, to the extent that any obligations or rights did not take effect under sub-paragraph 3.2.1 prior to and for the duration of the Party Entry Processes, such obligations or rights shall, from the date of notification of completion of the Party Entry Processes under this sub-paragraph 3.2.4, take effect and thereby apply to the relevant Party, or Parties as relevant, in their entirety. 3.2.5 A Party or Party Representative may refer a failure to agree pursuant to sub- paragraphs 3.2.1 to 3.2.4 or any other dispute in relation to the scope, content or performance of the Party Entry Processes, to the Authority as a Dispute in accordance with Section H, paragraph 4.1. 3.2.6 Prior to a person becoming a Party, the Party Representatives shall, if requested to do so by the Authority, take all reasonable steps to develop (in consultation with that person) the Party Entry Processes that could apply were that person to accede to the Framework Agreement, including, the identification of any proposals for the amendment of the Code in accordance with Section B, paragraph 7 that the Party Representatives may consider to be necessary for the purpose of the Party Entry Processes that might apply were that person to accede. 4. PARTY DETAILS 4.1 For the purposes of this Code, the "Party Details" of a Party, which shall include for the purposes of this paragraph 4, a Party Applicant, are the following details and documentation of the Party: 4.1.1 its full name and contact details; 4.1.2 the name, address, and email address of the person for whose attention notices issued in accordance with Section G, paragraph 12 should be marked; 4.1.3 details for service of process; 4.1.4 a copy of its current ESO Licence or Transmission Licence (in the case of an Offshore Transmission Owner a copy of the notice from the Authority shall be provided and following this a copy of its Transmission Licence shall be provided five Business Days after the grant of its Transmission Licence); 4.1.5 the Party's VAT registration number; and 4.1.6 its Party Category. 4.2 Each Party shall: 4.2.1 provide its Party Details to the Panel Secretary; and Version 26 B-4 24 September 2025 4.2.2 ensure that its Party Details for the time being provided to the Panel Secretary remain accurate and complete in all material respects. 4.3 Without prejudice to the generality of paragraph 4.2, if at any time: 4.3.1 a Party wishes to change any of its contact details forming part of such Party Details; or 4.3.2 the Party Details of a Party otherwise cease for whatever reason to be accurate and complete in all material respects, then such Party shall notify the Panel Secretary as soon as reasonably practicable (and, wherever possible, in advance of such change) and shall provide such further information and supporting documentation as the Panel Secretary may reasonably require to evidence such change. 4.4 The Panel Secretary shall: 4.4.1 maintain an up-to-date list of the contact details forming a part of the Party Details in respect of each of the Parties and ensure that such list is available on the Code Website; 4.4.2 upon receipt of Party Details from a Party pursuant to paragraph 4.2, make available such Party Details to each of the other Parties and the Authority. The Panel Secretary shall update Schedule A of this STC accordingly; 4.4.3 promptly update the Party Details pursuant to paragraph 4.3 and notify the Parties and the Authority of any such changes; and 4.4.4 fulfil the role of the Code Administrator for the STC Modification Panel, in which role it shall maintain, publish, review and (where appropriate) amend from time to time the Code Administration Code of Practice approved by the Authority in conjunction with other code administrators. 5. WITHDRAWAL 5.1 Procedure 5.1.1 Each Party (the "Withdrawing Party") shall be entitled to withdraw from the Framework Agreement (including pursuant to an assignment or transfer under Section G paragraph 6) and thereby cease to be a Party from the Withdrawal Date under sub-paragraph 5.1.4. 5.1.2 A Withdrawing Party shall give notice to the Panel Secretary, each of the other Parties and the Authority of its intention to withdraw from the Framework Agreement (a "Withdrawal Notice"), which Withdrawal Notice shall include a Proposed Withdrawal Date. In any case where a Party is notified that its ESO Licence or Transmission Licence will be revoked, that Party shall be deemed to have issued a Withdrawal Notice on the date of such notice of revocation. 5.1.3 As soon as reasonably practicable following the date of issue of a Withdrawal Notice under sub-paragraph 5.1.2, each Party Representative shall use its reasonable endeavours to agree the procedures, processes and steps required to be taken by each of the Parties (such agreement not to be unreasonably withheld) such that a remaining Party would not be caused to be in breach of its obligations under the Code as a consequence of the withdrawal of the Withdrawing Party ("Decommissioning Actions") after the Withdrawal Date (as defined at sub- paragraph 5.1.4) and such Decommissioning Actions may be amended as Version 26 B-5 24 September 2025 required from time to time upon agreement by the Party Representatives (such agreement not to be unreasonably withheld). 5.1.4 Each Party shall expeditiously undertake such actions as are required of it under and pursuant to the Decommissioning Actions to give effect to their timely completion, following which, the Panel Secretary shall give notice to the Authority of the completion of such Decommissioning Actions on behalf of the Parties following agreement by the Party Representatives of such notice. Such notification shall specify the date upon which the Withdrawing Party shall withdraw from the Framework Agreement which date (subject to sub-paragraph 5.1.5) shall be referred to herein as the "Withdrawal Date". 5.1.5 A Withdrawing Party cannot withdraw from the Framework Agreement and thereby cease to be a Party to the Code until the Withdrawal Date or, if at such Withdrawal Date, the Withdrawing Party is subject to an ESO Licence or Transmission Licence Condition by virtue of which it is required to be a Party and/or to comply with the Code or which would otherwise be infringed if the Withdrawing Party withdrew from the Framework Agreement. In such event, the Withdrawal Date shall be postponed to such date as it no longer applies. The Withdrawing Party shall notify the Authority of the date from which the ESO Licence or Transmission Licence Condition no longer applies and copy such notice to each of the other Parties. 5.1.6 A Party may refer a failure to agree the Decommissioning Actions pursuant to sub- paragraph 5.1.3 or other dispute in relation to the scope, content or performance of the Decommissioning Actions as a Dispute to the Authority in accordance with Section H, paragraph 4.1. 5.1.7 Prior to the issue of a Withdrawal Notice, the Party Representatives shall, if requested to do so by the Authority, take all reasonable steps to develop the Decommissioning Actions that could apply upon issue of a Withdrawal Notice under sub-paragraph 5.1.2. 5.2 Consequential Provisions 5.2.1 Where a Withdrawing Party withdraws from the Framework Agreement and thereby ceases to be a Party pursuant to paragraph 5.1, the provisions of this paragraph 5.2 shall apply. 5.2.2 With effect from the Withdrawal Date (as amended under sub-paragraph 5.1.5 as appropriate): 5.2.2.1 the Withdrawing Party shall, subject to the provisions of sub-paragraph 5.2.3, be automatically released and discharged from all of its obligations and liabilities under the Code (including, for the avoidance of doubt, relevant Code Procedures to which they are a Party and the Framework Agreement); and 5.2.2.2 each other Party shall, subject to the provisions of sub-paragraph 5.2.3, be automatically released and discharged from all of its obligations and liabilities to the Withdrawing Party under the Code (including, for the avoidance of doubt, relevant Code Procedures to which they are a Party and the Framework Agreement). 5.2.3 Any release and discharge referred to in sub-paragraph 5.2.2 shall not extend to the rights and liabilities (whether actual, contingent, accrued or otherwise) of a Party as at the Withdrawal Date (whether or not the other Parties are aware of such rights and liabilities at the Withdrawal Date). Version 26 B-6 24 September 2025 5.2.4 Save as provided in sub-paragraph 5.2.2, the Framework Agreement and Code shall, upon withdrawal of any Party, remain in full force and effect and binding on each of the other Parties. 5.2.5 Withdrawal of a Withdrawing Party from the Framework Agreement shall not affect and shall be without prejudice to any accrued rights or liabilities that such Withdrawing Party may have under the Code, which rights or liabilities shall continue to be governed by the terms of this Code and the provisions of Section A, paragraph 3 and Section F, paragraph 2 and this paragraph 5.2 shall survive the withdrawal of the Withdrawing Party from the Framework Agreement. 6. THE STC MODIFICATION PANEL 6.1 Establishment and composition 6.1.1 The Parties shall establish a panel ("STC Modification Panel") which shall be constituted in accordance with the further provisions of this paragraph 6. 6.1.2 The STC Modification Panel shall comprise of Party Representatives appointed as follows: • The Company may appoint not more than two persons by giving notice of such appointment to the Panel Secretary, and may remove and re-appoint by notice. • Each Onshore Transmission Owner may appoint not more than two persons by giving notice of such appointment to the Panel Secretary, and may remove and re-appoint by notice. • Prior to 31st March 2011, Offshore Transmission Owners may appoint not more than two persons for the period up to 31st March 2011 by jointly giving notice of such appointment to the Panel Secretary. Effective from 1st April 2011 and thereafter, Offshore Transmission Owners may appoint not more than two persons in accordance with Annex B1. • Competitively Appointed Transmission Owners may appoint not more than two persons by collectively in accordance with Annex B2 giving notice of such appointment to the Panel Secretary. and such Party Representatives shall attend each meeting of the STC Modification Panel (“STC Modification Panel Meeting”). 6.1.3 The STC Modification Panel shall be assisted by a secretary ("Panel Secretary") who shall be a person appointed and provided by The Company. The Panel Secretary shall carry out such activities as are specified in this Code and as are otherwise agreed between the Party Representatives from time to time but shall not have a right to vote at any STC Modification Panel Meeting. 6.1.4 In addition to the Party Representatives and Panel Secretary, there shall be a chairperson of the STC Modification Panel who shall be appointed annually (or as otherwise agreed by the Party Representatives) by and with the agreement of the Party Representatives and who shall, taking into account the functions set out in sub-paragraph 6.3.2, carry out such activities as may be agreed between the Party Representatives from time to time but shall not have a right to vote at any STC Modification Panel Meeting (" Panel Chairperson"). Version 26 B-7 24 September 2025 6.1.5 The Authority shall be entitled to receive notice of, and to appoint one or more representatives to attend and speak at, any STC Modification Panel Meeting but, for the avoidance of doubt, such representatives shall not have a right to vote at any such STC Modification Panel Meeting. 6.1.6 Any person designated by the Authority under sub-paragraph 7.2.2.1(b) below shall be entitled to receive notice of, and to appoint up to two representatives to attend and speak at, any STC Modification Panel Meeting but, for the avoidance of doubt, such representative(s) shall not have a right to vote at any such STC Modification Panel Meeting and shall not be deemed to be Party Representatives. 6.1A Alternate Representatives 6.1A.1 At the same time that Party Representatives are appointed under paragraph 6.1.2, no more than 2 Alternate Representatives representing Offshore Transmission Owners and two alternate Representatives representing Competitively Appointed Transmission Owners may be appointed in accordance with the procedure set out in Annex B2. 6.1A.2 Such Alternate Representatives will form a group from which Party Representatives representing Offshore Transmission Owners may select a person to act as their alternate under this Paragraph 6.1A. 6.1A.3 A Party Representative representing Offshore Transmission Owners may appoint such an Alternate Representative to be their alternate for any one STC Modification Panel Meeting, and may remove a person so appointed as alternate, by giving notice of such appointment or removal to the Panel Secretary. A Party Representative must choose an Alternate Representative who has not been already chosen by another Party Representative for that STC Modification Panel Meeting. If there are no Alternate Representatives left who have not already been so chosen by another Party Representative, the Party Representative may chose as their alternate any Alternate Representative or other Party Representative who is not already acting as alternate for more than one Party Representative. 6.1A.4 All information to be sent by the Panel Secretary to Party Representatives pursuant to this Section B shall also be sent by the Panel Secretary to each Alternate Representative (whether or not currently selected as an alternate for a Party Representative) by electronic mail (where relevant details shall have been provided by each Alternate Representative). 6.1A.5 Alternates: General Provisions 6.1A.5.1 The appointment or removal by a Party Representative of an alternate shall be effective from the time when such notice is given to the Panel Secretary or (if later) the time specified in such notice. 6.1A.5.2 The Panel Secretary shall promptly notify all Party Representatives and Parties of appointment or removal by any Party Representative of any alternate and (where relevant details have been provided to the Panel Secretary) despatch by electronic mail shall fulfil this obligation. 6.1A.5.3 In accordance with paragraph 6.1A, an alternate may act as alternate for more than one Party Representative. 6.1A.6 Alternates: Rights, Cessation and References 6.1A.6.1 Where a Party Representative has appointed an alternate: Version 26 B-8 24 September 2025 6.1.6.1.1 the alternate shall be entitled to receive notices of meetings of the STC Modification Panel unless the appointing Party Representative shall otherwise notify the Panel Secretary; and, 6.1.6.1.2 the alternate shall be entitled to attend, speak and vote at any meeting of the STC Modification Panel at which the Party Representative by whom they were appointed is not present, and at such meeting to exercise and discharge all of the functions, duties and powers of such Party Representative; 6.1.6.1.3 the alternate shall cast one vote for each Party Representative by whom they were appointed, in addition (where they are a Party Representative themselves) to their own vote; 6.1A.6.2 Paragraphs 6.3, 6.4 and 6.6 shall apply to the alternate as if they were the appointing Party Representative and a reference to a Party Representative elsewhere in this Code shall, unless the context otherwise requires, include their duly appointed alternate. 6.1A.6.3 For the avoidance of doubt, the appointing Party Representative shall not enjoy any of the rights transferred to the alternate at any meeting at which, or in relation to any matter on which, the alternate acts on their behalf. 6.1A.7 A person appointed as an alternate shall automatically cease to be such alternate: 6.1A.7.1 if the appointing Party Representative ceases to be a Party Representative; 6.1A.7.2 if any of the circumstances in Paragraph 6.1C.1(b) applies in relation to such person, but, in the case of an Alternate Representative, shall continue to be an Alternate Representative available for appointment under paragraph 8.6.2 6.1B Term of Office 6.1B.1 The term of office of a Party Representative and Alternate Representatives in each case representing Offshore Transmission Owners or Competitively Appointed Transmission Owners shall be a period expiring on 31 March every year following the Offshore Go-Live Date and from 01 January 2017, a period expiring on 31 March every two years. A Party Representative and Alternate Representative shall be eligible for reappointment on expiry of their term of office. 6.1C Removal from Office 6.1C.1 A person shall cease to hold office as a Party Representative or an Alternate Representative. (a) upon expiry of their term of office unless re-appointed; (b) if they: (i) resign from office by notice delivered to the Panel Secretary; (ii) become bankrupt or make any arrangement or composition with their creditors generally; Version 26 B-9 24 September 2025 (iii) are or may be suffering from mental disorder and either are admitted to hospital in pursuance of an application under the Mental Health Act 1983 or the Mental Health (Scotland) Act 1960 or an order is made by a court having jurisdiction in matters concerning mental disorder for their detention or for the appointment of a receiver, curator bonis or other person with respect to their property or affairs; (iv) become prohibited by law from being a director of a company under the Companies Act 1985; (v) die; or (vi) are convicted on an indictable offence; or (c) if the STC Modification Panel resolves (and the Authority does not veto such resolution by notice in writing to the Panel Secretary within 15 Business Days) that they should cease to hold office on grounds of their serious misconduct; 6.1C.2 A STC Modification Panel resolution under Paragraph 6.1C.1(c) shall, notwithstanding any other paragraph, require the vote in favour of at least all Party Representatives less one (other than the Party Representative or Alternate Representative who is the subject of such resolution) and for these purposes an abstention shall count as a vote cast in favour of the resolution. A copy of any such resolution shall forthwith be sent to the Authority by the Panel Secretary. 6.1C.3 A person shall not qualify for appointment as a Party Representative or Alternate Representative if at the time of the proposed appointment they would be required by the above paragraph to cease to hold that office. 6.1C.4 The Panel Secretary shall give prompt notice to all Party Representatives, all Parties and the Authority of the appointment or re-appointment of any Party Representative or Alternate Representative or of any Party Representative or Alternate Representative ceasing to hold office and publication on the Code Website and (where relevant details are supplied to the Panel Secretary) despatch by electronic mail shall fulfil this obligation. 6.2 Functions of the STC Modification Panel and the Code Administrator’s Role 6.2.1 The functions of the STC Modification Panel shall be the: 6.2.1.1 evaluation and administration of amendments to the Code in accordance with the procedures set out in this Section B; 6.2.1.2 review of the consequences of amendments to the Code; 6.2.1.3 administration of the Code as specified in this Section B; 6.2.1.4 establishment of joint working arrangements pursuant to sub-paragraph 7.2.9.1 below; and 6.2.1.5 consideration of any changes to the Code Administrator Code of Practice that the Code Administrator considers appropriate to raise. 6.2.2 The STC Modification Panel shall endeavour at all times to perform its functions: Version 26 B-10 24 September 2025 6.2.2.1 in an efficient, economical and expeditious manner, taking account of the complexity, importance and urgency of particular STC Modification Proposals; and 6.2.2.2 with a view to ensuring that the Code facilitates achievement of the Applicable STC Objectives. 6.2.3 The Company shall establish and maintain a Code Administrator function, which shall carry out the roles referred to in Paragraphs 4.4.4 and 6.2.4. 6.2.4 The Code Administrator will undertake, and the STC Modification Panel shall ensure that the Code Administrator will undertake, its functions consistently with the Code Administrator Code of Practice. The Code Administrator will provide assistance to Parties insofar as practicable, and on reasonable request, in relation to their engagement with the STC Modification process 6.2.5 The procedures set out in the Code, to the extent that they are dealt with in the Code Administration Code of Practice, are consistent with the principles contained in the Code Administration Code of Practice. Where inconsistencies or conflicts exist between the Code and the Code Administration Code of Practice, the Code shall take precedence. 6.3 Structure of STC Modification Panel Meetings 6.3.1 STC Modification Panel Meetings shall be held on a monthly basis unless otherwise requested by a Party Representative and with the agreement of the other Party Representatives, or as otherwise specifically provided for in this Section B, at such time, at such place in Great Britain and in such form including, without limitation, by way of teleconference as the Party Representatives shall decide. 6.3.2 In the event that the Panel Chairperson is not present within fifteen minutes of the scheduled start of any STC Modification Panel Meeting and has not nominated another person to take the position of chairperson pursuant to sub-paragraph 6.4.2, those Party Representatives present shall appoint one of their number to act as Panel Chairperson for that STC Modification Panel Meeting. Subject to paragraph 6.4, the functions of the Panel Chairperson include: 6.3.2.1 to ensure that STC Modification Panel Meetings are conducted in a proper, impartial and efficient manner; 6.3.2.2 to ensure that each Party Representative, any person invited to speak pursuant to sub-paragraph 6.5.1, any representatives of any person designated by the Authority under sub-paragraph 6.1.6 and any representative of the Authority have been given a reasonable opportunity to speak on any matter raised in a notice issued to each Party Representative pursuant to sub-paragraph 6.3.5; and 6.3.2.3 to ensure that any relevant matter is put to a vote pursuant to paragraph 6.4 during the STC Modification Panel Meeting. 6.3.3 In the event that the Panel Secretary is not present within fifteen minutes of the scheduled start of any STC Modification Panel Meeting, those Party Representatives present shall appoint one of their number to act as Panel Secretary for that STC Modification Panel Meeting. 6.3.4 A Party or other person designated under sub-paragraph 7.2.2.1(b) may submit matters (excluding new modifications) and any supporting papers for consideration at a STC Modification Panel Meeting to be received by the Panel Secretary not Version 26 B-11 24 September 2025 less than five Business Days before the date of that STC Modification Panel Meeting or such shorter period as the Party Representatives may agree. Where a STC or STCP Modification Proposal is received more than ten (10) Business Days prior to the next STC Panel meeting, the Panel Secretary shall place the STC Modification Proposal on the agenda of the next STC Panel meeting and otherwise shall place it on the agenda of the next succeeding STC Panel meeting. 6.3.5 In accordance with this paragraph 6.3, a STC Modification Panel Meeting shall be convened by the Panel Secretary, by notice to each Party Representative: 6.3.5.1 setting out the date, time and place of the STC Modification Panel Meeting and (unless the Party Representatives decide otherwise) giving at least ten Business Days' notice before the date of the STC Modification Panel Meeting; 6.3.5.2 accompanied by an agenda of the matters for consideration at the STC Modification Panel Meeting and any supporting papers at the time the notice is given, and subsequently send to the Party Representatives any supporting papers received not less than five Business Days before the date of the STC Modification Panel Meeting or such shorter period as the Party Representatives may agree. 6.3.6 The Panel Secretary shall send a copy of the notice convening a STC Modification Panel Meeting, and the agenda and papers accompanying the notice to the following persons at the same time as the notice under sub-paragraph 6.3.5 is given to the Party Representatives: 6.3.6.1 the appointed representative(s) of the Authority; and 6.3.6.2 any other person designated by the Authority under sub-paragraph 7.2.2.1(b), and subsequently send to such persons any supporting papers received not less than five Business Days or on such earlier date as the Party Representatives receive such supporting papers under sub-paragraph 6.3.5. 6.3.7 With the consent of all Party Representatives the requirements of this paragraph 6.3 as to the date of, manner in and notice on which a STC Modification Panel Meeting is convened, may be waived or modified including, without limitation, pursuant to sub-paragraph 6.3.8 (save that the Party Representatives may not exercise this right to waive or detrimentally modify the rights held by Authority representatives or persons designated by the Authority under sub-paragraph 7.2.2.1(b)). 6.3.8 Where: 6.3.8.1 any matter not contained in the agenda for a STC Modification Panel Meeting is put before a STC Modification Panel Meeting; and 6.3.8.2 in the opinion of the Party Representatives it is necessary (in view of the urgency of the matter) that the STC Modification Panel should resolve upon such matter at the STC Modification Panel Meeting, (subject always to the provisions of paragraph 6.4), the Party Representatives may so resolve upon such matter at the STC Modification Panel Meeting. 6.4 Proceedings at STC Modification Panel Meetings Version 26 B-12 24 September 2025 6.4.1 Subject as expressly provided in the Code, the Party Representatives may regulate the conduct of and adjourn and convene STC Modification Panel Meetings as they deem fit. 6.4.2 The Panel Chairperson shall preside as chairperson of every STC Modification Panel Meeting unless the Panel Chairperson is unable to attend in which case such other person shall take the position of chairperson as the Panel Chairperson shall nominate to act in their place. 6.4.3 Subject to sub-paragraph 6.4.6, no business shall be transacted at any STC Modification Panel Meeting unless a Quorum (as defined in sub-paragraph 6.4.5) is present. 6.4.4 Each (and only each) Party Representative shall be entitled to exercise one vote at a STC Modification Panel Meeting. A matter before the STC Modification Panel must be agreed in accordance with sub-paragraph 6.6 in order to be passed. 6.4.5 For the purposes of this paragraph 6, a "Quorum" shall be constituted where each Party Category is represented by at least one Party Representative unless (a) all of the Party Representatives representing a Party Category notify the Panel Secretary and the other Party Representatives that the matters to be discussed at such STC Modification Panel Meeting do not materially affect the Party Category, in which case such Party Representatives (with the consent of the other Party Representatives) may waive their right to attend and vote, or (b) no Party Representatives have been appointed in accordance with paragraph 6.1.2 by a Party Category. For the avoidance of doubt, in the circumstances where Party Representatives representing a Party Category have waived their right to attend a meeting matters may only to be voted upon that are contained within the agenda or papers circulated pursuant to paragraph 6.3.5 or 6.3.6. 6.4.6 Where a Quorum is not present, the Panel Secretary shall seek to adjourn such STC Modification Panel Meeting to a later date unless it is the third consecutive STC Modification Panel Meeting that has been required to be adjourned as a consequence of the failure to attend by a particular Party Representative, in which case, such STC Modification Panel Meeting shall nonetheless proceed and subsequent ratification of decisions taken at the STC Modification Panel Meeting by such non-attending Party Representative shall not be required unless the lack of attendance by such Party Representative (on any of the three occasions) was as a consequence of an omission to send such Party Representative the details of the STC Modification Panel Meeting required pursuant to sub-paragraph 6.3.5 (unless otherwise agreed pursuant to sub-paragraph 6.3.7), in which case such ratification must be obtained. 6.4.7 An omission to send STC Modification Panel Meeting documents to a person entitled to receive them under sub-paragraph 6.3.6.2 shall not prevent a STC Modification Panel Meeting from proceeding unless otherwise directed by the Authority. 6.4.8 As soon as is practicable after each STC Modification Panel Meeting, the Panel Secretary shall prepare and send to the Party Representatives and the Authority the minutes of such STC Modification Panel Meeting, which shall be approved (or amended and approved) by the STC Modification Panel at the next STC Modification Panel Meeting after they were so sent and, when approved, the Panel Version 26 B-13 24 September 2025 Secretary shall publish the approved minutes (excluding any matter which it was agreed at such STC Modification Panel Meeting was not appropriate for such publication) on the Code Website. 6.5 Attendance by other persons 6.5.1 A Party Representative may, with the agreement of the other Party Representatives, invite any person other than a person already entitled to attend under paragraph 6.1 to attend all of, or any part of, a STC Modification Panel Meeting and to speak at such STC Modification Panel Meeting or part thereof, where that person so attends. For the avoidance of doubt, a person invited under this paragraph 6.5 shall not have a right to vote at any such STC Modification Panel Meeting or part thereof. 6.6 Agreement of the Party Representatives 6.6.1 Where any provision of this Section B refers to or requires the agreement of the Party Representatives or the Relevant Parties, such agreement must be sought in accordance with the provisions of this paragraph 6.6: 6.6.2 The agreement of the Party Representatives shall be considered to be reached where: 6.6.2.1 There is the unanimous agreement among the Party Representatives, or 6.6.2.2 The number of votes cast in favour of a matter considered in accordance with the Code Voting Procedure is not less than 65%. 6.6.3 Where any provision of this Section B refers to or requires the agreement of the Relevant Party Representatives then such agreement shall be considered to be reached where: 6.6.3.1 There is unanimous agreement amongst the Party Representatives representing the Relevant Party Categories; or, 6.6.3.2 The number of votes cast in favour of a matter considered in accordance with the Code Voting Procedure is not less than 65%. 6.7 Code Voting Procedure 6.7.1 The purpose of this paragraph 6.7 is to make provision for the Party Representatives to vote on behalf of the Parties they are representing as to whether any proposal should be accepted or rejected (the “Code Voting Procedure”). 6.7.2 Each proposal shall be put to a vote of the Party Representatives only in accordance with paragraph 6.6. Groups 6.7.3 The Party Representatives for the Offshore Transmission Owner Parties shall have one collective vote to cast. The Party Representative for the Competitively Appointed Transmission Owner Parties shall have one collective vote to cast. Version 26 B-14 24 September 2025 The Company, NGET, SPT and SHETL shall each have one vote to cast. With respect to paragraphs 6.7 and 6.8. The Company, NGET, SPT, SHETL shall each be referred to as a ‘Group’, all Offshore Transmission Owner Party Representatives combined shall be considered as one ‘Group’ and all Competitively Appointed Transmission Owner Parties combined shall be considered as one ‘Group’. 6.7.4 The STC Modification Panel shall procure the design, establishment and maintenance of a system by which: 6.7.4.1 a report on each proposal to be voted upon is sent to all Party Representatives eligible to vote, specifying the matters to be voted upon, the Party Representatives eligible to vote and the time period within which votes must be cast; 6.7.4.2 each Group within each Party Category that is eligible to vote may cast one (and not more than one) vote on each of the questions comprising each vote; 6.7.4.3 each Group that votes is given the opportunity (but is not obliged) to comment on the reasons for its vote; 6.7.4.4 the vote of each Group is cast by means of a standard form; 6.7.4.5 the vote of each Group is cast in such a way as to permit its authentication as the valid and properly authorised vote of that Group; 6.7.4.6 the vote of each Group may be transmitted in such a manner as (so far as is reasonably practicable) ensures that it is secure and will not be interfered with; and 6.7.4.7 the votes of all of the Groups are received and collated for the purposes of Paragraph 6.8. 6.7.5 The STC Modification Panel shall ensure that all Party Representatives are informed of the means by which they may have access to and use the system established under Paragraph 6.7.4 for the purposes of the Code Voting Procedure, and of any changes made to that system from time to time which are likely to affect the way in which it may be accessed and used. The Vote 6.7.6 In respect of each proposal and the report relating to that proposal, the Groups within the Party Categories specified in that report as eligible to vote shall be entitled to cast a vote to accept or to reject each of the questions comprising each vote 6.7.7 Each Group which casts a vote on whether to accept or reject the proposal: 6.7.7.1 vote on the basis of its judgment, made by it in good faith, as to whether or not, if the proposal were made, the proposal would better facilitate the achievement of the Applicable STC Objectives than if that proposal were not made; and 6.7.7.2 where it wishes to do so, provide a statement in accordance with the system established under Paragraph 6.7.4 of the reasons, by reference to the Applicable STC Objectives, for its vote. Version 26 B-15 24 September 2025 6.7.8 Where, in respect of a proposal and a Party Category that is specified in the relevant STC Modification Report as being eligible to vote, no Group in that Party Category casts a vote, such Party Category shall, for the purposes of Paragraph 6.8, be treated as if it were not eligible to vote. 6.8 Decision 6.8.1 An STC Modification Proposal shall be accepted where, in respect of each Party Category that was eligible to vote, the number of Groups in that Party Category which voted to accept the proposal is greater than 65% of the total number of Groups in that Party Category which voted 6.8.2 In all other cases an STC Modification Proposal shall be rejected. 6.8.3 The Secretariat shall, as soon as is reasonably practicable after the acceptance or rejection of an STC Modification Proposal, give notice of that decision to: 6.8.3.1 each Party Representative; 6.8.3.2 any person or body that is designated in writing by the Authority for the purpose of paragraph 7.2.2.1 (b); and 6.8.3.3 the Authority, 7. MODIFICATION OF THE CODE AND CODE PROCEDURES 7.1 General 7.1.1 For the purposes of this paragraph 7 only, references to the "Code" shall be deemed not to include reference to the Code Procedures or to Schedule Two. 7.1.2 The process for amending Code Procedures and Schedule Two is set out in paragraph 7.3. 7.1.3 The Code and Code Procedures may (and may only) be amended from time to time pursuant to the ESO Licence condition E4. 7.1.3A Amendments to The Code and Code Procedures may be in response to a Significant Code Review or the Electricity Regulation and/or any relevant Legally Binding Decisions of the European Commission and/or the Agency, as provided for in the ESO Licence. 7.1.3B Change Routes (a) A STC Modification Proposal may be a Standard STC Modification Proposal, or it may be subject to additional process steps, if raised during a Significant Code Review, or it may be raised pursuant to paragraph 7.1.10.1 where the Authority reasonably considers that such STC Modification Proposal is necessary to comply with or implement the Electricity Regulation and/or any relevant Legally Binding Decisions of the European Commission and/or the Agency. (b) If a STC Modification Proposal is deemed by the STC Modification Panel to meet the Self-Governance Criteria, it will be subject to a different process. Version 26 B-16 24 September 2025 (c) If a STC Fast Track Modification Proposal is determined by the STC Modification Panel to meet the Fast Track Criteria, it will be subject to the process set out at STCP25-3 and shall become a STC Fast Track Report. 7.1.4 An amendment to the Code or to a Code Procedure may necessitate amendment to the contents of a relevant TO Construction Agreement (as opposed to the form of the terms which are set out in a Schedule to the Code and therefore a part of the Code) and, in those circumstances, those agreements contain provisions for such alterations to be effected. 7.1.5 Each Party shall keep under review whether any possible change to this Code or any Code Procedure would better facilitate achievement of the Applicable STC Objectives and shall, in accordance with this paragraph 7 and, to the extent that such matter is not covered by a STC Modification Proposal or a proposed amendment to a Code Procedure, propose such change which, in the Party's opinion, would do so. 7.1.6 The Party Representatives shall endeavour at all times to act pursuant to this Section B, paragraph 7: 7.1.6.1 in an efficient, economical and expeditious manner taking account of the complexity, importance and urgency of a particular amendment; and 7.1.6.2 with a view to ensuring that the Code, Schedule Two and the Code Procedures facilitate achievement of the Applicable STC Objectives. 7.1.7 Significant Code Review (a) A Significant Code Review is a code review process initiated and led by the Authority, on one of a number of potential triggers. The Authority will launch a Significant Code Review on publication of a notice setting out matters such as the scope of the review, reasons for it and announcing the start date. (b) A Significant Code Review Phase begins on the start date set out in the Authority’s notice, during which time STC Modification Proposals that relate to the subject matter of the review are restricted, to ensure the process is as efficient as possible. The Significant Code Review Phase shall end either: (i) on the date on which the Authority issues a statement that no directions will be issued or that no modification proposal will be issued in accordance with Paragraph 7.1.7(iii) will be issued in relation to the STC; or (ii) if no statement is made, on the date on which a Party has made a modification proposal in accordance with directions issued by the Authority; or (iii) if no statement is made, on the date that the Authoirty raises a modification proposal in accordance with Paragraph 7.1.10.1 arising from the relevant Significant Code Review (iv) immediately, if neither a statement, nor directions, nor a modification proposal in accordance with Paragraph 7.1.10.1 are issued by the Authority within (and including) Version 26 B-17 24 September 2025 twenty-eight (28) days from the Authority’s publication of its Significant Code Review conclusions. (c) If the Authority issues a statement that it will continue work on the Significant Code Review and/or issues a direction in accordance with Paragraph 7.1.12 then the Significant Code Review Phase will be deemed to have ended when: (i) the Authority issues a statement that the Significant Code Reivew phase has ended (ii) one of the circumstances in Paragraphs 7.1.7(b)(i) or 7.1.7(b)(iii) occurs (irrespective of whether such circumstance occurs within twenty-eight (28) days after the Authority has published its Significant Code Reivew Conclusions); or (iii) if the Authority makes a decision consenting, or otherwise, to the modification of the STC following the Panel’s submission of its report under sub-paragraph 7.1.11.2. (d) A process is set out in this Section B and STCP 25-1 for analysing and consulting on STC Modification Proposals with a view to referring to the Authority those that may be restricted during a Significant Code Review. Subject to Paragraph 7.1.8, those STC Modification Proposals that are not so restricted proceed as Standard STC Modification Proposals and requiring consultation with the industry followed by approval or non-approval by the Authority. 7.1.8 Self-Governance In addition, Self-Governance Criteria are set out against which STC Modification Proposals must also be evaluated and consulted upon. If a proposal meets the criteria, it may proceed without Authority approval, and the STC Modification Panel may consult on and determine itself whether to implement the STC Modification Proposal. 7.1.9 Fast Track If the STC Modification Panel unanimously determines that a STC Modification Fast Track Report meets the Fast Track Criteria, it will proceed without Authority approval. 7.1.10 Authority Raised or Directed Modification 7.1.10.1 The Authority may: (a) itself; or (b) direct a Party to raise a STC Modification Proposal that is in respect of a Significant Code Review and/or where the Authority reasonably considers that such STC Modification Proposal is necessary to comply with or implement the Electricity Regulation and/or any relevant Legally Binding Decisions of the European Commission and/or the Agency. 7.1.10.2 The Party shall comply with any directions issued by the Authority in relation to setting and/or amending a timetable for; Version 26 B-18 24 September 2025 (a) the raising of a STC Modification Proposal pursuant to paragraph 7.1.10.1(b); and/or (b) where the Authority has approved a STC Modification Proposal raised pursuant to Paragraph 7.1.10.1, implementation of such STC Modification Proposal. 7.1.10.3 In respect of a STC Modification Proposal raised pursuant to paragraph 7.1.10.1, the STC Modification Panel and the Panel Secretary shall each comply with any timetable(s) directed by the Authority in relation to setting and/or amending a timetable for the completion of all relevant steps of the modification process or such other processes set out in this paragraph 7. 7.1.10.4 Notwithstanding any other provision in this paragraph 7, a STC Modification Proposal raised pursuant to Paragraph 7.1.10.1: (a) shall not be withdrawn by any Party without the prior consent of the Authority. (b) shall not be amalgamated with any other STC Modification Proposal without the prior consent of the Authority. 7.1.10.5 If, pursuant to paragraph 7.1.10.4, the Authority consents to the withdrawal of a STC Modification Proposal, the provisions of paragraph 7.2.2.6 shall apply to such STC Modification Proposal. 7.1.10.6 In respect of any STC Modification Proposal which has been raised by paragraph 7.1.10.1, the views of the relevant Workgroup, the voting rights of the STC Modifications Panel or the recommendation of the Workgroup Report or the STC Modification Report in respect of such STC Modification Proposal shall not be fettered or restricted notwithstanding that such STC Modification Proposal has been so raised under paragraph 7.1.10.1. 7.1.10.7 A STC Modification Proposal shall still be assessed against the Self- Governance Criteria and the Fast Track Criteria notwithstanding that it has been raised pursuant to paragraph 7.1.10.1. 7.1.10.8 In relation to any STC Modification Proposal raised by a Party other than pursuant to Paragraph 7.1.10.1, where the Authority reasonably considers such STC Modification Proposal to be necessary to comply with or implement the Electricity Regulation and/or any relevant Legally Binding Decisions of the European Commission and/or the Agency, the provisions of Paragraphs 7..1.10.1 to 7.1.10.7 shall apply. 7.1.11 Authority Led STC Modification 7.1.11.1 Where the Authority has issued a statement in accordance with Paragraph 7.1.7(c) and/or a Backstop Direction in accordance with Paragraph 7.1.12, the Authority may submit an Authority Led STC Modification Proposal for an Authority Led STC Modification directly to the Panel. 7.1.11.2 In response to an Authority Led STC Modification the Panel shall prepare an Authority Led STC Modification Report which shall include: (a) an evaluation of the proposed modification; and Version 26 B-19 24 September 2025 (b) an assessment of the extent to which the proposed modification would better facilitate achieving the applicable STC objective(s); and (c) a detailed explanation of the Panel’s reasons for that assessment (such assessment to include, where the impact is likely to be material, an assessment of the quantifiable impact of the proposal on greenhouse gas emissions, to be conducted in accordance with any such guidance on the treatment of carbon costs and evaluation of greenhouse gas emissions as may be issued by the Authority from time to time); and (d) an assessment, to the extent practicable, of the likely impact on each STC Party’s Transmission System and any other systems of that STC Party and an assessment of the likely impact on the National Electricity Transmission System , of the proposed modification; (e) an assessment of the impact of the modification on the core industry documents and the changes expected to be required to such documetns as a consequence of the modification; (f) a recommendation by the Panel, by reference to the Panel’s assessment against the applicable STC objectives, as to whether the proposed modification should be made; (g) to the extent practicable, the combined views of the STC parties concering the modification or, where a combined view is not practicable, the views of each STC Party; and (h) a timetable for implementation of the modification, including the date with effect from which such modification (if made) would take effect. 7.1.11.3 The Authority Led STC Modification Report shall be submitted to the Authority as soon after the Authority Led STC Modification Proposal is submitted for evaluation as is appropriate (taking into account the complexity, importance and urgency of the modification) for the proper execution and completion of the steps in sub- paragraph 7.1.11.2. 7.1.11.4 The Authority can require the revision and re-submission of the Authority Led STC Modification Report, such resubmission to be made, if required, by a direction issued by the Authority to the Panel in accordance with Paragraph 7.2.5.15, as soon after the Authority;s direction as is appropriate (taking into account the complexity, importance and urgency of the modification). 7.1.11.5 The timetable referred to in Paragraph 7.1.11.2(h) for implementation of any modification shall be in accordance with any direction(s) issued by the Authority, or where no such direction has been issued by the Authority, the timetable shall be such as will enable the modification to take effet as soon as practicable after the Authority has directed that such modification should be made, account being taken of the complexity, importance and urgency of the modification with the Authority having discretion to change the timetable after those persons likely to be affected by the revision of the timetable have been consulted. 7.1.11.6 The timetable for the completion of the procedural steps for an Authority Led STC modification, as outlined in Paragraphs 7.1.11.2, 7.1.11.3 and 7.1.11.4 shall be set by the Authority in its sole discretion. 7.1.11.7 The Authority’s published conclusions and Authority Led STC Modification Proposal shall not fetter the voting rights of the members of the Panel or the recommendation procedures informing the report described at Paragraph 7.1.11.2. Version 26 B-20 24 September 2025 7.1.12 Backstop Direction 7.1.12.1 Where a STC Modification Proposal has been made in relation to a Significant Code Review in accordance with Paragraph 7.1.10.1 or Paragraph 7.1.11.1 the Authority may issue a direction (a “Backstop Directon”), which requires such proposal(s) and any alternatives to be withdrawn and which causes the Significant Code Review Phase to recommence. 7.2 Amendment of the Code 7.2.1 The remainder of this paragraph 7.2 is subject to the Urgent STC Modification Proposal procedures under sub-paragraph 7.2.6. 7.2.2 STC Modification Proposals 7.2.2.1 A proposal to amend the Code may be made by any of the following: (a) a Party; or (b) such person or persons having a relevant interest as may be designated in writing for this purpose by the Authority from time to time; or, (c) a Party Representative, or, (d) The Authority pursuant to 7.1.10.1 (referred to in this Section B as the "Proposer"). 7.2.2.2 A proposal made pursuant to sub-paragraph 7.2.2.1 shall be submitted in writing to the Panel Secretary and shall contain the following information in relation to such proposal: (a) the name of the Proposer; (b) a description (in reasonable but not excessive detail) of the issue or defect which the proposal seeks to address; (c) a description (in reasonable but not excessive detail) of the proposal and of its nature and purpose; (d) where possible, an indication of those parts of the Code and Code Procedures which, in the opinion of the Proposer, would be likely to require amendment in order to give effect to (or would otherwise be affected by) the proposal and an indication of the nature and contents of those amendments or effects (including, where relevant, any need for the establishment of new Code Procedures or removal of existing Code Procedures); (e) the reasons why the Proposer believes that the proposal would better facilitate achievement of the Applicable STC Objectives as compared with the then current version of the Code, together with background information in support thereof; Version 26 B-21 24 September 2025 (f) where possible, an indication of the potential impact of the proposal on the BSC, CUSC or any Core Industry Document and an indication of potential inconsistencies between the proposal and the Capacity Market Documents and/or the CfD Documents; (g) the reasoned opinion of the Proposer as to whether the STC Modification Proposal would have a quantifiable effect on greenhouse gas emissions, where the impact is likely to be material, assessed in accordance with such current guidance on the treatment of carbon costs and evaluation of the greenhouse gas emissions as may be issued by the Authority from time to time; (h) where possible, an indication of the potential impact of the proposal on relevant computer systems and processes used by the Parties and on any STC Modification Proposal; and (i) where a Proposer is a person falling under sub-paragraph 7.2.2.1(b), a statement to the effect that the Proposer acknowledges that, on acceptance of the proposal as a STC Modification Proposal for consideration by the STC Modification Panel (pursuant to sub-paragraph 7.2.2.3) and, notwithstanding that the Proposer is