Section 2(1): section 1, Part 1, subpart 3 of Part 2, and Part 3 (other than section 50(1)(a) and (c)–(h) and section 51) brought into force, on 1 August 2003, by clause 2 of the Climate Change Response Act Commencement Order 2003 (SR 2003/151).
Section 2(1): subparts 1 and 2 of Part 2 and sections 50(1)(a) and (c)–(h) and 51 brought into force, on 19 November 2007, by clause 2 of the Climate Change Response Act Commencement Order 2007 (SR 2007/336).
Section 2(2): inserted, on 28 October 2021, by section 3 of the Secondary Legislation Act 2021 (2021 No 7).