| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 3(1) | words inserted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(1)(a) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 3(1) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(1)(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 3(1) | words omitted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(1)(c)(i) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 3(1) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(1)(c)(ii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7(1) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7(4) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7A(2) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(a) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 7D(1) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 8(4A) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(c) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 8(7C) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(c) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(3)(ga) | inserted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 7(2) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(5A) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(d) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 10A(10)(c) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 7(3) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 30(2) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(3)(a) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 30(2) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(3)(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 30(2)(a)(b) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(3)(c) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 30(6) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(4) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 35(1) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(5)(a)(i) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 35(3)-(6) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(5)(a)(ii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 35(7) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(5)(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 35(8) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(5)(a)(iii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 35(10)-(12) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(5)(a)(iv) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 35(14) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(5)(a)(v) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 36 (2) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(6)(a)(ii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 36(1) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(6)(a)(i) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 36(3) | substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(6)(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 36(7) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(6)(a)(iii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37 Heading | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(a)(i) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(1) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(a)(i) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(3)-(5) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(a)(ii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(6) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(7) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(a)(iii) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(9)-(11) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(a)(iv) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(13) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(7)(a)(v) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 37(14) | added | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 8 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38(1) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 4(8) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38(3) | added | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 9 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(1)(2) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(e) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(1) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(2)(d) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(1)(a) | word omitted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(2)(a) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(1)(b) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(2)(b) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(1)(c) | inserted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(2)(c) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(3) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(3) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(3) | words inserted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(3) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(3A) | inserted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(4) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(4) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(5) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(4A) | inserted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 10(6) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art.038A(4B) | inserted(temp.) | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 11 | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 38A(6) | words substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(e) | Yes | |
| The Gas (Northern Ireland) Order 1996 | 1996 No. 275 | art. 39A(1)-(3) | word substituted | The Gas (Internal Markets) Regulations (Northern Ireland) 2020 | 2020 No. 279 | reg. 5(f) | Yes | |