“the commencement day”

1. Animal Welfare Act 2006 Act
2. Anti-social Behaviour, Crime and Policing Act 2014 Act 6 definitions
3. Apprenticeships, Skills, Children and Learning Act 2009 Act
4. Armed Forces Act 2016 Act 2 definitions
5. Bus Services Act 2025 Act
6. Capital Allowances Act 2001 Act 2 definitions
7. The Central Counterparties (Amendment, etc., and Transitional Provision) (EU Exit) Regulations 2018 SI
8. The Chemicals (Health and Safety) (Amendment, Consequential and Transitional Provision) Regulations 2026 SI
9. Civil Aviation Act 2012 Act 4 definitions
10. Communications Act 2003 Act
11. Corporation Tax Act 2010 Act 2 definitions
12. Corporation Tax (Northern Ireland) Act 2015 Act 2 definitions
13. Counter-Terrorism and Border Security Act 2019 Act
14. Crime and Policing Act 2026 Act
15. Criminal Justice and Court Services Act 2000 Act
16. The Cultural Test (Television Programmes) (Amendment) Regulations 2015 SI
17. Data (Use and Access) Act 2025 Act 3 definitions
18. Defence Reform Act 2014 Act
19. The Digital Economy Act 2010 (Transitional Provision) Regulations 2012 SI
20. The Electronic Commerce and Solvency 2 (Amendment etc.) (EU Exit) Regulations 2019 SI
21. The Employment and Trading Income etc. (Loan Charge Settlement Scheme) Regulations 2026 SI
22. Employment Rights Act 1996 Act 2 definitions
23. The Employment Rights Act 1996 (Protection from Detriment in Health and Safety Cases) (Amendment) Order 2021 SI
24. Employment Rights Act 2025 Act 2 definitions
25. Energy Act 2010 Act
26. European Union Referendum Act 2015 Act 2 definitions
27. The Films (Definition of “British Film”) Order 2015 SI
28. Finance Act 1996 Act
29. Finance Act 2009 Act
30. Finance Act 2011 Act
31. Finance Act 2013 Act 2 definitions
32. Finance Act 2014 Act
33. Finance Act 2016 Act
34. Finance (No. 2) Act 2023 Act
35. Finance (No. 3) Act 2010 Act 2 definitions
36. The Financial Services and Markets Act 2000 (Dissolution of the Board of Banking Supervision) (Transitional Provisions) Order 2001 SI
37. The Government Stock (Consequential and Transitional Provision) (No. 2) Order 2004 SI
38. The Government Stock (Consequential and Transitional Provision) (No.3) Order 2004 SI
39. Greater London Authority Act 2007 Act 4 definitions
40. The Greater London Magistrates' Courts Authority (Financial Administration) Regulations 2000 SI
41. Health and Care Act 2022 Act
42. The Health Protection (Coronavirus, International Travel and Operator Liability) (England) (Amendment) (No. 26) Regulations 2021 SI
43. Immigration Act 2014 Act
44. The Immigration and Social Security Co-ordination (EU Withdrawal) Act 2020 (Consequential, Saving, Transitional and Transitory Provisions) (EU Exit) Regulations 2020 SI
45. The Immigration, Nationality and Asylum (EU Exit) Regulations 2019 SI
46. The Information about People with Significant Control (Amendment) Regulations 2017 SI
47. Investigatory Powers Act 2016 Act
48. The Judicial Pensions (Fee-Paid Judges) Regulations 2017 SI
49. The Land Registration (Amendment) Rules 2008 SI
50. The Law Enforcement and Security (Amendment) (EU Exit) Regulations 2019 SI
51. Legal Aid, Sentencing and Punishment of Offenders Act 2012 Act 3 definitions
52. Local Government Act 2000 Act
53. Local Government and Housing Act 1989 Act
54. The Mental Health Act 2007 (Commencement No. 6 and After-care under Supervision: Savings, Modifications and Transitional Provisions) Order 2008 SI
55. The Mental Health Act 2007 (Commencement No. 7 and Transitional Provisions) Order 2008 SI
56. The Mental Health Act 2007 (Commencement No. 8 and Transitional Provisions) Order 2008 SI
57. National Security and Investment Act 2021 Act
58. The National Security and Investment Act 2021 (Commencement No. 2 and Transitional and Saving Provision) Regulations 2021 SI
59. Northern Ireland Troubles (Legacy and Reconciliation) Act 2023 Act
60. The Nuclear Safeguards (EU Exit) Regulations 2019 SI
61. Offender Rehabilitation Act 2014 Act
62. Parliamentary Buildings (Restoration and Renewal) Act 2019 Act
63. Pensions Act 1995 Act
64. Police, Crime, Sentencing and Courts Act 2022 Act
65. Prisoners and Criminal Proceedings (Scotland) Act 1993 Act
66. The Private Storage Aid for Pigmeat (England) Regulations 2021 SI
67. Protection of Freedoms Act 2012 Act
68. The Public Offers and Admissions to Trading (Amendment and Consequential and Transitional Provisions) Regulations 2025 SI
69. The Registered Pension Schemes (Modification of the Rules of Existing Schemes) Regulations 2006 SI
70. The Registered Pension Schemes (Unauthorised Payments by Existing Schemes) Regulations 2006 SI
71. The Renewables Obligation Order 2015 SI
72. Social Security (Consequential Provisions) Act 1992 Act
73. Social Security (Consequential Provisions) (Northern Ireland) Act 1992 Act
74. Social Security Contributions and Benefits Act 1992 Act 2 definitions
75. Social Security Contributions and Benefits (Northern Ireland) Act 1992 Act 2 definitions
76. The Social Security (Lone Parents and Miscellaneous Amendments) Regulations 2012 SI
77. The Social Security (Recovery of Benefits) Regulations 1997 SI
78. The South Downs National Park Authority (Establishment) Order 2010 SI
79. Taxation of Chargeable Gains Act 1992 Act
80. The Terrorism (Protection of Premises) (Notification Requirements) Regulations 2026 SI
81. Third Parties (Rights against Insurers) Act 2010 Act
82. The Trade Remedies (Increase in Imports as a Result of a Free Trade Agreement Causing Serious Injury to UK Producers) Regulations 2024 SI
83. The Warm Home Discount (England and Wales) Regulations 2022 SI
84. The Warm Home Discount (England and Wales) Regulations 2026 SI
85. Water Act 2003 Act
86. Welfare Reform and Pensions Act 1999 Act
87. The Immigration (Amendment) (EU Exit) Regulations 2019 (expired—not approved) SIRevoked

Definitions are taken from the instruments as published on zoomLaw, for guidance only. Check the instrument itself for its scope and any amendments.