| The Electricity (Northern Ireland) Order 1992 | 1992 No. 231 | art. 47A | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 31(3) | Yes | |
| The Competition and Service (Electricity) (Northern Ireland) Order 1992 | 1992 No. 1720 | art. 6 | repealed | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 31(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 3(1) | words inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 12(a) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 3(1) | semicolon substituted for full stop and words inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 12(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 6(1)(b) | word deleted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 13 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 6(1)(c) | word and semicolon substituted for comma | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 13 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 6(1)(d) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 13 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7(1) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 14 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7(4A)(4B) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 15 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7A-7D | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 16 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 8(1)(c) | semicolon substituted for full stop | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 17(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 8(1)(d) | added | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 17(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 8(2) | semicolon substituted for full stop | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 17(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 8(2)(d) | added | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 17(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(5) | word and semicolon substituted for full stop | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 18(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(5)(a) | words deleted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 18(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(5)(c) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 18(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(5A) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 18(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(6)(b)(ii) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 18(3) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(10) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 18(4) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10B | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 19 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 11(1)(1A) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 20 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 11(2) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 20 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 12(1)(c) | semicolon substituted for full stop | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 21 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 12(1)(d) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 21 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 13(1) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 22 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 14(1)(2) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 23 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 14(11) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 23 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 15(2)(a) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 24 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 17(2) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 25 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 17(6) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 25 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 17A(9) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 26 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 18(1)(2) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 27 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 18(4) | words substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 27 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 24B | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 32(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 27A(1)(a) | substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 28(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 27A(7)(8)(9) | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 28(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37A | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 29(1) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38B | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 29(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 39A 39B | inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 30 | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 2(2) | words inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 3(a) | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 2(2) | word omitted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 3(b) | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 2(2) | word inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 3(b) | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 2(2) | added | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 3(b) | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 2(2) | words inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 3(c) | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 2(2) | words inserted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 3(d) | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 8A(4) | substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 4 | Yes | |
| The Energy (Northern Ireland) Order 2003 | 2003 No. 419 | art. 13(1A)(1B) | substituted for (1A) | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 5 | Yes | |
| The Electricity (Single Wholesale Market) (Northern Ireland) Order 2007 | 2007 No. 913 | art. 9 | excluded by S.I. 2003/419 (N.I. 6), art. 8A(4) as substituted | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 4 | Yes | |
| The Electricity (Single Wholesale Market) (Northern Ireland) Order 2007 | 2007 No. 913 | art. 9 | modifed by S.I. 2003/419 (N.I. 6), art. 13(1A)(1B) as substituted for (1A). | The Gas and Electricity (Internal Markets) Regulations (Northern Ireland) 2013 | 2013 No. 92 | reg. 5 | Yes | |