| Social Security Contributions and Benefits Act 1992 | 1992 c. 4 | Sch. 1 para. 3(1) | excluded by S.I. 2001/1004 reg. 84(1) (as substituted) | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 8 | Yes | |
| Social Security Contributions and Benefits Act 1992 | 1992 c. 4 | Sch. 1 para. 3(1) | excluded by S.I. 2001/1004 reg. 84(4) (as substituted) | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 8 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 1(2) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 3 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9 heading | words inserted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 4(2) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2)-(2A) | substituted for reg. 9(2) | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 4(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 10 | word substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 5(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 10(a) | word substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 5(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 10(b) | word substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 5(c) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 21 and heading | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 6 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 49(1) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 7 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 84 | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 8 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 85 | omitted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 9 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 90(4) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 10(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 90(4) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 10(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 94 heading | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 11(2) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 94(1) | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 11(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 95 | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 12 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 99(1)(a) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 13(2) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 99(3) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 13(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 99(4) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 13(4) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 100 and heading | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 14 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 103(2) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 15 | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(b)(iv)-(v) | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(2)(a)(i) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(b)(vii)-(viii) and words | inserted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(2)(a)(ii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(c) | omitted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(2)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 9(1)(f)-(h) | inserted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(3)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 9(1) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(3)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 11(4) | substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(4) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(c)(i) | words substituted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(a)(i) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(c)(ii) | omitted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(a)(ii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(c)(iii) | omitted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(a)(ii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(d) | word omitted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(da)-(db) | inserted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(2)(d) | word omitted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(c) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(2)(da)-(db) | inserted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(5)(c) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 26(3A) | inserted | The Social Security (Contributions) (Amendment) Regulations 2003 | 2003 No. 193 | reg. 16(6) | Yes | |