| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 2 | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 4(a) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 2 | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 4(b) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 2 | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 4(c) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 2 | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 4(d) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 2 | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 4(e) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 2 | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 4(f) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 7(8) | inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 5 | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 8 | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 6(a) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 8 | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 6(b) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 9(1)(b) | word inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 7 | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(2)-(4) | substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(a) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(5)(a) | words omitted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(b)(i)(aa) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(5)(a) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(b)(i)(bb) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(5)(b) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(b)(ii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(5)(c) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(b)(iii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(6) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(c) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 10(7) | word substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 8(d) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(1) | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(a) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(2) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(b)(i) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(2) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(b)(ii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(4) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(c)(i) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(4) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(c)(ii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(5)(6) | substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(d) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11(7) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 9(e) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 11A | inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 10 | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 12 | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 11(a) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 12 | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 11(b) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 13(2)(a)(i) | words omitted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 12(a) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 13(5) | words omitted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 12(b) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(1)(a) | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(a)(i) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(1)(b)(i)(ii) | substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(a)(ii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(2) | words omitted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(b) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(4)(a) | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(c)(i) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(4)(b)(i)-(v) | substituted for reg. 14(4)(b)(i)-(iii) | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(c)(ii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(5) | substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(d) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(5A)(5B) | inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(e) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(6) | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(f)(i) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 14(6) | words inserted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 13(f)(ii) | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | reg. 18(1)(a)-(e) | substituted for reg. 18(1)(a)-(c) | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 14 | Yes | |
| The Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999 | 1999 No. 1672 | Sch. 3 Pt. 1 | words substituted | The Gas Transporter Pipe-line Works (Environmental Impact Assessment) (Amendment) Regulations 2007 | 2007 No. 1996 | reg. 15 | Yes | |