Modifications to Network Rail's Network Code

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The rail industry can propose changes to Network Rail's Network Code through Part C. ORR has a role to approve those changes as any modifications to the Code may have a bearing on Track Access contracts.

Part C of the Network Code provides processes by which the Code can be modified.

  • Condition C5, which provides a democratic industry process whereby Network Rail, train operators or ORR can propose changes; and
  • Condition C8, which provides the ORR with a right to make changes.

Recent modifications are listed below.

Proposal Approval notice
Covering letter
Proposals for amendment
Date approvedLinks to documents
Approval of Changes to Part D of the Network Code
(Proposal for Change 125)
7 March 2024Approval Notice
Cover Letter
Appendix A – Approved changes (Part D)
Approval of Changes to Part D and Part R of the Network Code
(Proposals for Change 121-124 and 126)
8 February 2024    Approval Notice
Cover Letter
Appendix A – Approved changes (Part D)
Appendix B – Approved changes (Part R)
Approval of proposals for amendment to the September 2023 Delay Attribution Principles and Rules
February 2024    
6 February 2024Approval Notice
Schedule 1
Cover Letter
Approval of proposals for amendment to the April 2023 Delay Attribution Principles and Rules17 July 2023Approval Notice
Schedule 1
Cover Letter 
Approval of proposals for amendment to the April 2023 Delay Attribution Principles and Rules24 April 2023Approval Notice
Cover Letter
Approval of Changes to Part B and Part R of the Network Code
(Proposal for Change 119)
27 February 2023Approval Notice
Cover Letter
Appendix A – Approved changes (Part B and Part R)
Approval of proposals for amendment to the September 2022 Delay Attribution Principles and Rules    17 February 2023Approval Notice
Cover Letter
Approval of Changes to Part R of the Network Code
(Proposal for Change 114-116)
4 August 2022Approval Notice
Cover Letter
Appendix A – Approved changes (Part R)
Approval of proposals for amendment to the April 2022
Delay Attribution Principles and Rules
 27 July 2022 Approval Notice
Cover letter
Approval of Changes to Part D and Part R of the Network Code                               
(Proposal for Change 109-112)   
18 May 2022 Approval Notice 
Cover Letter     
Appendix A - Approved changes (Part D  
Appendix B - Approved changes (Part R)
Approval of proposals for amendment to the September 2021
Delay Attribution Principles and Rules
16 February 2022Approval notice 
Cover letter
Approval of proposals for amendment to the November 2020
Performance Data Accuracy Code 
20 October 2021Approval notice
Cover letter
Approved changes
Approval of proposals for amendment to the April 2021
Delay Attribution Principles and Rules
28 July 2021Approval notice
Cover letter
Approval of Changes to Part D of the Network Code
(Proposal for Change 98-99 and 102-105)
13 July 2021Approval notice
Cover letter
Appendix - Approved changes
 
Approval of proposals for amendment to the September 2020  
Delay Attribution Principles and Rules
5 February 2021Approval notice
Cover letter
Approval of Changes to Part D and Part R of the Network Code
(Proposal for Change 91-94 and 97)
17 December 2020Approval notice
Cover letter
Appendix A- Approved changes (Part D)
Appendix B- Approved changes (Part R)
Approval of proposals for amendment to the September 2020  
Delay Attribution Principles and Rules    
11 November 2020Approval notice
Cover letter
Approval of proposals for amendment to the June 2018
Performance Data Accuracy Code 
10 September 2020Approval notice
Cover letter
Overview of amendments
Marked up PDAC
Approval of proposals for amendment to the April 2020
Delay Attribution Principles and Rules
18 June 2020Approval notice 
Cover letter 
Approval of Changes to Part D of the Network Code
(Proposal for Change 90)
16 March 2020Approval notice
Cover letter
Approved changes 
Approval of Changes to Part D of the Network Code
(Proposal for Change 78-81 and 84-87)
16 March 2020Approval notice
Cover letter
Approved changes
Approval of proposals for amendment to the September 2019
Delay Attribution Principles and Rules
7 January 2020Approval notice
Cover letter 
Approval  of Changes to Chapter B of the Access Dispute Resolution Rules12 September 2019Approval notice
Cover letter
Appendix 3 Approved changes
Approval  of Changes to Part B of the Network Code21 August 2019Approval notice
Cover letter
Appendix 3 Approved changes
Approval of proposals for amendment to the September 2018
Delay Attribution Principles and Rules
20 August 2019Approval notice
Cover letter 
Approval of proposals for amendment to the September 2018
Delay Attribution Principles and Rules
25 February 2019Approval notice
Cover letter
Approval of proposals for amendment to the September 2018
Delay Attribution Principles and Rules
30 January 2019Approval Notice
Cover letter
Approval of proposals for amendment to the April 2018 Delay Attribution Principles and Rules21 August 2018Approval notice
Cover letter
Approval  of Changes to Part B of the Network Code9 May 2018Approval notice
Cover letter
Appendix 1 Approved changes 
Approval  of Changes relating to the Network Change Standard forms U, V and W6 April 2018Approval notice
Cover letter
Appendix 1 Approved changes
Approval of proposals for amendment to the January 2014 Performance Data Accuracy Code23 March 2018Approval notice
Cover letter
Proposal for Amendment
Final version of Marked up PDAC 
Approval of proposals for amendment to the December 2017 Delay Attribution Principles and Rules26 February 2018Approval notice
Cover letter
Proposals for amendments
Approval of proposals for amendment to the June 2017 Delay Attribution Principles and Rules11 October 2017Approval notice
Covering letter 
Proposals for amendments   icon , 0 Kb
Approval of proposals for amendment to the June 2017 Delay Attribution Principles and Rules14 August 2017Approval notice   icon , 0 Kb  
Covering letter   icon , 0 Kb
Proposals for Amendment   icon , 0 Kb
Approval of proposal for change 72 – amendments to Part H of the Access Dispute Resolution Rules28 June 2017
Approval of proposal for change 71 – amendments to Parts D & J and all other parts of the Network Code28 June 2017

Proposal for Change – Part D
Proposal for Change – Part J

Approval of proposals for amendment to the April 2017 Delay Attribution Guide8 May 2017Approval notice
Covering letter
Proposal for amendment
Approval of proposal for change 70 – amendments to Part B of the Network Code8 May 2017Approval notice
Covering letter
Proposal for amendment
Approval of proposals for amendment to the September 2016 Delay Attribution Guide1 February 2017Approval notice
Covering letter
Proposal for amendment    icon , 0 Kb
Approval of proposals for amendment to the April 2016 Delay Attribution Guide21 July 2016Approval notice
Covering letter
Proposal for amendment  pdf icon PDF, 966 Kb
Approval of proposals for amendment to the Delay Attribution Guide1 June 2016Approval notice
Covering letter
Proposal for amendment  pdf icon PDF, 265 Kb
Approval of proposals for amendment to the September 2015 Delay Attribution Guide - (multiple amendments)17 February 2016Approval notice
Covering letter
Proposals for amendment 
Approval of proposals for amendments to the Delay Attribution Guide18 December 2015Approval notice
Covering letter
Proposals for amendment 
Approval of proposal for change 69 – amendments to Part B of the Network Code11 December 2015Approval notice  pdf icon PDF, 372 Kb
Covering letter  pdf icon PDF, 569 Kb
Proposals for amendment
Approval of proposals for amendments to the Delay Attribution Guide4 December 2015Approval notice 
Covering letter
Proposals guide  pdf icon PDF, 491 Kb
Approval of proposal for change 66 - amendments to the Access Dispute Resolution Rules9 September 2015Approval notice  pdf icon PDF, 907 Kb
Proposals for amendment
Approval of proposals for amendment to the Delay Attribution Guide7 August 2015Approval notice
Covering letter
Proposals for amendment 
Approval of proposals for amendment to the Delay Attribution Guide - (multiple amendments)6 August 2015Approval notice
Covering letter
Proposals for amendment 
Approval of proposals for amendment to the April 2015 Delay Attribution Guide - (multiple amendments)7 July 2015Approval notice 
Covering  letter  pdf icon PDF, 163 Kb 
Proposals for amendment  
Approval of proposal for change 67 – amendments to Part B of the Network Code7 July 2015Approval notice
Proposals for amendments to Part B of the Network Code  pdf icon PDF, 258 Kb
Approval of proposal for change 68 – amendments to Part D of the Network Code29 June 2015Approval notice
Original proposed changes to Part D of the Network Code
Final proposed changes to Part D of the Network Code PDF icon PDF, 158 Kb 
Approval of proposals for amendment to the April 2015 Delay Attribution Guide - (multiple amendments)24 June 2015Approval notice  pdf icon PDF, 668 Kb
Proposals for amendment
Covering letter  
Approval of proposals for amendment to the Delay Attribution Guide - (multiple amendments)28 April 2015Approval notice
Covering letter
Proposals for amendment 
Approval of proposals for amendment to the Delay Attribution Guide - (multiple amendments)26 March 2015Approval Notice  pdf icon PDF, 245 Kb
Covering letter  pdf icon PDF, 278 Kb
Proposals for amendment
Approval of proposal for change 65 – amendment to Part J of the Network Code and to the Access Dispute Resolution Rules16 March 2015Final proposed changes to Part J and to ADRR
Original proposed changes to Part J and to ADRR
Approval Notice
Approval of proposals for amendment to the Delay Attribution Guide - (multiple amendments)26 February 2015Approval notice
Covering letter  pdf icon PDF, 456 Kb
Proposals for amendments
Amendments to the October 2014 Delay Attribution Guide11 Feb 2015Approval notice  pdf icon PDF, 169 Kb
Covering letter  pdf icon PDF, 141 Kb
Proposals for amendments  pdf icon PDF, 145 Kb
Approval of proposal for amendment to the Delay Attribution Guide – DAB/P2314 December 2014Approval notice
Covering letter
Proposals for amendments  pdf icon PDF, 168 Kb
Approval of proposals for amendment to the Delay Attribution Guide - (multiple amendments)10 September 2014Approval notice
Covering letter  pdf icon PDF, 55 Kb
Proposals for amendments 
Approval of proposal for amendment to the Delay Attribution Guide – (multiple amendments)27 February 2014Approval notice

Covering letter
Amendments to the July 2011 Performance Data Accuracy Code19 November 2013Approval notice 
Proposal for amendment
Approval of proposal for amendment to the Delay Attribution Guide – DAB/P02016 September 2013

Approval notice

Covering letter

Proposal for amendment

Approval of proposal for amendment to the Delay Attribution Guide – DAB/P015 & DBS-410 May 2013Approval notice

Covering letter
Approval of proposal for amendment to the Delay Attribution Guide – DAB/P0185 February 2013Approval notice

Covering letter

Proposal for amendment
Approval of proposals for amendment to the Delay Attribution Guide – DAB/P014, DAMG/P05 & DAMG/P068 Jan 2013Approval notice

Covering letter

Marked up version of amendments

Proposal for Amendment
Approval of proposal for change to the Delay Attribution Guide - DABP009.20 Nov 2012Proposal for Change

Covering Letter

Approval Notice

Final version of marked up Appx A DABP009
Approval of proposal for change to the Delay Attribution Guide - NPR131.20 Nov 2012Proposal for Change

Covering Letter

Approval Notice

Final version of marked up Appx A NRP131
Approval of proposal for change 61 - amendments to Parts D, J, & M of the Network Code and to the Access Dispute Resolution Rules14 Jun 2012Approval notice

Revised Part J

Annex D: Proposal for change to Part D of the Network Code
Annex D: Proposal for change to Part M of the Network Code
Annex E: Proposal for change to ADRR
Approval of proposal for change 62 – amendments to the Access Dispute Resolution Rules14 Jun 2012Approval notice

Revised ADRR
Approval of proposal for change 63 – amendments to Part A of the Network Code14 Jun 2012Approval notice

Revised Part A
Approval of amendment to the Delay Attribution Guide30 Mar 2012Approval notice

Covering letter

Proposal for change
Approval of proposal for change 60 - amendments to part D of the Network Code2 Mar 2012Proposal for amendment