| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9 heading | words substituted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(2)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9 heading | words inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(2)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2) | words substituted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(3)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2) | words inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(3)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2A)(b) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(4)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2A)(ba) | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(4)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2A)(ba) | comma substituted for word | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(4)(c) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | reg. 9(2A)(d) and word | inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 3(4)(d) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(b)(vii) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(2)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(b)(viia) | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(2)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(b)(viia) | word inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(2)(c) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 7(13)(b)(ix) and word | substituted for full stop | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(2)(d) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 9(1)(g) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 9(1)(ga) | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(3)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 9(1)(ga) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(3)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 9(1)(i) and word | substituted for semicolon | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(3)(c) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 11(4) | words substituted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(4)(a) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 11(4) | words inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(4)(b) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(da) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(a)(i) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(daa) | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(a)(ii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(daa) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(a)(iii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(1)(dc) and word | substituted for full stop | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(a)(iv) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(2)(da) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(b)(i) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(2)(daa) | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(b)(ii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(2)(daa) | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(b)(iii) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4 para. 22(2)(dc) and word | substituted for full stop | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 4(5)(b)(iv) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4A para. 15 | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 5(2) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4A para. 16 | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 5(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4A para. 17 | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 5(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4A para. 17A 17B | inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 5(4) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4B para. 3 | word omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 6(2) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4B para. 4 | omitted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 6(3) | Yes | |
| The Social Security (Contributions) Regulations 2001 | 2001 No. 1004 | Sch. 4B para. 4A | inserted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 6(4) | Yes | |
| The Tax Credits (Definition and Calculation of Income) Regulations 2002 | 2002 No. 2006 | reg. 4(1)(h) | substituted | The Social Security and Tax Credits (Miscellaneous Amendments) Regulations 2015 | 2015 No. 175 | reg. 7 | Yes | |