Clean Air Act 1993

[^key-501c533dcb8e3af58da29c17c65fc857]: Words in Sch. 1A para. 1 inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 3(a); S.I. 2025/937, art. 2(g)

[^key-50bf9a557be6c9e9793da9eecbf4645e]: Words in s. 27(1) substituted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 15(b)(i); S.I. 2025/937, art. 2(g)

[^key-5199da411d283d2d6fe7cb668510b5aa]: Sch. 2 para. 4(2)(a) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 9(c); S.I. 2025/937, art. 2(g)

[^key-51f20803ac5edf5e042cde5d3ba3f2ef]: S. 36 excluded (E.) (7.1.2015) by The Clean Air (Miscellaneous Provisions) (England) Regulations 2014 (S.I. 2014/3318), regs. 2(1), 11, Sch. 3

[^key-52ef4c3432d750fa97f4cbe3ecd1315f]: Word in s. 63(3) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 23(b) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-5561686c119701e98bbef08fac890ce9]: S. 21 renumbered as s. 21(5) (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), ss. 50(3)(a), 61(2); S.S.I. 2014/160, art. 2(1)(2), sch. S. 21 renumbered as s. 21(5) (E.W.) (1.10.2015) by Deregulation Act 2015 (c. 20), ss. 15(5), 115(7); S.I. 2015/1732, art. 2(b)

[^key-569554db207c2f4ee6b4bf2655dd46bb]: Act modified (E.) (6.4.2010) by The Bristol Port Health Authority Order 2010 (S.I. 2010/1214), arts. 1, 4, Sch.

[^key-57a01d44c6d54223a9ca74647ecab7bb]: Words in s. 36(2A) substituted (1.4.2013) by The Natural Resources Body for Wales (Functions) Order 2013 (S.I. 2013/755), art. 1(2), Sch. 2 para. 344 (with Sch. 7)

[^key-5808329489e9046e98c736a444b91d9b]: Words in s. 16(5)(a) substituted (S.) (1.5.2005) by Building (Scotland) Act 2003 (asp 8), s. 59(1), Sch. 6 para. 20(a) (with s. 53); S.S.I. 2004/404, art. 2(1)

[^key-595a0aae86a794d7cc8016dd83e58c65]: Word in s. 31(4)(a) repealed (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(2)(a)(i); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-59f91a5cd3f38612e99bad714ce0f108]: Words in s. 31(4)(a)(ii) substituted (1.4.2013) by The Natural Resources Body for Wales (Functions) Order 2013 (S.I. 2013/755), art. 1(2), Sch. 2 para. 343(2) (with Sch. 7)

[^key-5a7f0e1813337c27a346262547b3c630]: Words in s. 63(3) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 20(c); S.I. 2025/937, art. 2(g)

[^key-5bc10fcccd9bcf7dcef58f83d79cb7e5]: Pt. 3: functions etc. assigned to the Port Health Authority and modified (31.3.2017) by The Weymouth Port Health Authority Order 2017 (S.I. 2017/558), arts. 1(1), 9, Sch. 2 (with art. 9(3))

[^key-60833801b5fb48eb545cbb810bd4e4d9]: S. 20(5A)-(5C) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), ss. 50(2)(a), 61(2); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-63db98e023d77f7587b39443988b245c]: S. 19A and cross-heading inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 2 (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-681ce6f3d626f3d3449f7c80f797a164]: Words in s. 18(2A) inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 11(b); S.I. 2025/937, art. 2(g)

[^key-6c3861fab8e674a292b8a79147c762d9]: Words in Sch. 5 para. 13 inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 22(b); S.I. 2025/937, art. 2(g)

[^key-6df0dae8e0d493b252e3ae21aaca6808]: S. 68(2) repealed (22.7.2004) by Statute Law (Repeals) Act 2004 (c. 14), Sch. 1 Pt. 13

[^key-739f257646dc7553831930345379f496]: Words in s. 18(2)(b) substituted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 11(a); S.I. 2025/937, art. 2(g)

[^key-75f8a92d8498f1f76c036298fec17eca]: Sch. 2 para. 4(1)(a) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 9(b); S.I. 2025/937, art. 2(g)

[^key-7616b45a71d0a032ba82ecad3004dc41]: S. 16 modified by S.I. 2010/675, Sch. 23 Pt. 8 para. 3, Table 9 (as substituted (E.W.) (1.10.2011) by The Environmental Permitting (England and Wales) (Amendment) Regulations 2011 (S.I. 2011/2043), reg. 1(b), Sch. 1)

[^key-770f145052a5927e45286278ab68f1a5]: Words in s. 27(1) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 20(b)(iii) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-7e829723788f170d39e70790c6f28599]: Words in Sch. 1A para. 6(1) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 7; S.I. 2025/937, art. 2(g)

[^key-7fae88a9647c6b3eaefcaf64b22a6e01]: S. 56(2) substituted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 8 (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-80e265733fc6fb201fb9fb94d11065a5]: S. 31(6) inserted (1.4.2013) by The Natural Resources Body for Wales (Functions) Order 2013 (S.I. 2013/755), art. 1(2), Sch. 2 para. 343(3) (with Sch. 7)

[^key-816969734b447df91ef1c497442e01f1]: Sch. 1A inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 3 (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-89322c5c71c9e999dbd22e8d0c0c1548]: S. 41A(3)(a): words in s. 41A(3) renumbered as s. 41A(3)(a) (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(6)(c)(i); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-8945cb2fabfd095acd1e25ff602d20c9]: S. 44(2A)-(2C) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 7 (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-8b9cf3ab07b8dbc14dc0c286ecdbcd9f]: Words in s. 27(1) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 15(b)(ii); S.I. 2025/937, art. 2(g)

[^key-90b8d5719e618069139e7b26f7094621]: Sch. 1 paras. 1A, 1B inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 21(a); S.I. 2025/937, art. 2(g)

[^key-917ebba579edefbf9109cf9739c83c3b]: Ss. 19B-19D inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 4 (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-96c1c4450657b347ea6744bf733d249b]: Word in s. 16(5)(b) substituted (S.) (1.5.2005) by Building (Scotland) Act 2003 (asp 8), s. 59(1), Sch. 6 para. 20(b) (with s. 53); S.S.I. 2004/404, art. 2(1)

[^key-994953bf38659969bbd8142e491d2af1]: Ss. 20-23 and cross-headings repealed (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 12; S.I. 2025/937, art. 2(g)

[^key-9995db15db0cfb49051cbda2f9d851b0]: Act applied (with modifications) (E.) (24.3.2011) by The Hull and Goole Port Health Authority Order 2011 (S.I. 2011/939), arts. 1(1), 9, Sch. 2

[^key-9adc92f4254f32e859a2e611d69f6b28]: Sch. 5 paras. 12A, 12B inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 22(a); S.I. 2025/937, art. 2(g)

[^key-9d1c96d030f56f778be1576020951a96]: S. 21(1)-(4) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), ss. 50(3)(b), 61(2); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-9db55eee060cb1ddc79f9408148fd2c0]: Words in s. 58(1) omitted (1.10.2015) by virtue of Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 57(a); S.I. 2015/1630, art. 3(i) (with art. 8)

[^key-9e27299559ade9858566f8d09e6e7927]: Act modified (E.) (6.4.2010) by The Portsmouth Port Health Authority Order 2010 (S.I. 2010/1217), arts. 1(1), 4, Sch.

[^key-9eb18f8f198409d6cb93beb9e8ce95e2]: Words in s. 29 omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 16(a); S.I. 2025/937, art. 2(g)

[^key-a1cd9a7e44a96b9f58d3ea44bc7de380]: Sch. 1 para. 6B inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 21(c); S.I. 2025/937, art. 2(g)

[^key-a20a66acd7ae0dbb4180e156e7dd02e2]: Words in s. 33(1) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(3); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-a3e2ae5f3dfc53464e3055f7aa707e01]: Words in s. 41A(4) substituted (E.W.) (1.1.2017) by The Environmental Permitting (England and Wales) Regulations 2016 (S.I. 2016/1154), reg. 1(1), Sch. 29 para. 11(b) (with regs. 1(3), 77-79, Sch. 4)

[^key-a5486106edbb5ace1446b82743d3d092]: S. 30(5A) inserted (1.10.2015) by Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 52(3); S.I. 2015/1630, art. 3(i)

[^key-a7eb49b8c02c6ada254f936fa70e8671]: S. 30(5) omitted (1.10.2015) by virtue of Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 52(2); S.I. 2015/1630, art. 3(i) (with art. 8)

[^key-a97ab7c82d673233bce7b6dd04015b37]: S. 30(8) omitted (1.10.2015) by virtue of Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 52(4); S.I. 2015/1630, art. 3(i) (with art. 8)

[^key-aa2d12f01b5c45b6df56306011b41249]: Words in s. 28(3) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 21 (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-ad9029f60e9a7e72a0824c8b0c341526]: S. 20(5ZA)-(5ZC) omitted (1.5.2022) by virtue of Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 14(4) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-ada08f680e63b13c9f77537be785d863]: Words in s. 27(4) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 20(d) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-af3249c09d51fff8a58be1a662196681]: Words in s. 41A(1) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(6)(a); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-b033fce117d559afced0c5dcec4482a2]: Words in s. 2(5) substituted (E.W.) (12.3.2015) by The Legal Aid, Sentencing and Punishment of Offenders Act 2012 (Fines on Summary Conviction) Regulations 2015 (S.I. 2015/664), reg. 1(1), Sch. 4 para. 25 (with reg. 5(1))

[^key-b1938f6cd62be94e10c7ae1285a237e9]: Words in Sch. 1A para. 4(4) substituted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 5(a); S.I. 2025/937, art. 2(g)

[^key-b592ee7de50193ddd189df8b3cfac5fe]: S. 61(2) repealed (S.) (1.10.2009) by Public Health etc. (Scotland) Act 2008 (asp 5), s. 128(2), Sch. 3 Pt. 1 (with s. 127); S.S.I. 2009/319, art. 2(a), Sch. 1

[^key-b5aaf8d882f0e306b5abce2ca607b8fa]: Sch. 2 para. 4(1)(b) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 9(b); S.I. 2025/937, art. 2(g)

[^key-b68187c4e5195970abc929d0aa561ecb]: S. 21(5) omitted (16.4.2025) by virtue of Environment Act 2021 (c. 30), s. 147(4), Sch. 12 para. 11(3) (with s. 144); S.I. 2025/491, reg. 2(b)

[^key-b85ea7d0dab22fff41aa7754b2584886]: Words in Sch. 1A para. 5(1) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 6; S.I. 2025/937, art. 2(g)

[^key-b9482906f84639a54224454f2720db72]: Words in s. 36(2A) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(5); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-bbabb95c818c8a3617da51799a167d7b]: Words in s. 32(4) substituted (1.10.2015) by Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 54; S.I. 2015/1630, art. 3(i)

[^key-bc30f1f412a3e235c9170e6e17b94baf]: S. 36(3) repealed (1.4.2015 for S.) by Pollution Prevention and Control Act 1999 (c. 24), s. 7(3), Sch. 3; S.S.I. 2015/74, art. 2(2)(d)

[^key-be0ecf1315039436ebee4ef9a929a915]: S. 26(3) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 19(b) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-c0944e5431bdbb5d726adcec44ba0e03]: Words in s. 41A(4) substituted (E.W.) (6.4.2010) by The Environmental Permitting (England and Wales) Regulations 2010 (S.I. 2010/675), reg. 1(1)(b), Sch. 26 para. 10(4)(a) (with reg. 1(2), Sch. 4)

[^key-c23a994cae7cdbfe5e19b13ac3e73e0c]: Words in s. 61(4) repealed (S.) (1.10.2009) by Public Health etc. (Scotland) Act 2008 (asp 5), s. 128(2), Sch. 3 Pt. 1 (with s. 127); S.S.I. 2009/319, art. 2(a), Sch. 1

[^key-c3053e2318e3b92dd211127bf1e80375]: S. 41 repealed (1.4.2015 for S.) by Pollution Prevention and Control Act 1999 (c. 24), s. 7(3), Sch. 3; S.S.I. 2015/74, art. 2(2)(d)

[^key-c3a79b1d1751ecb01b9a84cd3bab60c3]: Words in s. 41A(3) inserted (E.W.) (6.4.2008) by The Environmental Permitting (England and Wales) Regulations 2007 (S.I. 2007/3538), Sch. 21 para. 22(3) (with reg. 72, Sch. 4)

[^key-c5fed193600b815f1f8f8e3ea85f69a8]: Words in Sch. 1 para. 5 substituted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 21(b); S.I. 2025/937, art. 2(g)

[^key-c66efeb80b80193392c42dca324eeeaf]: Words in s. 58(1) substituted (1.10.2015) by Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 57(b); S.I. 2015/1630, art. 3(i)

[^key-c6a33e07aedc8e2f1f10a11e476ee12c]: S. 41A(3)(b) and word inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(6)(c)(ii); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-c7a6e5be5f326c3918fbc4ed912491cc]: Words in s. 16(5)(c) substituted (S.) (1.5.2005) by Building (Scotland) Act 2003 (asp 8), s. 59(1), Sch. 6 para. 20(c) (with s. 53); S.S.I. 2004/404, art. 2(1)

[^key-c8ac7fc27c62b8af927a02717b8258eb]: S. 62(2)(c) repealed (S.) (1.4.2010) by Housing (Scotland) Act 2006 (asp 1), s. 195(3), Sch. 7 (with s. 193); S.S.I. 2009/122, art. 3

[^key-c8c05608f7312c0f0a82404bc6497b31]: Words in s. 21 heading repealed (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), ss. 50(4), 61(2); S.S.I. 2014/160, art. 2(1)(2), sch. Words in s. 21 heading omitted (E.W.) (1.10.2015) by virtue of Deregulation Act 2015 (c. 20), ss. 15(6), 115(7); S.I. 2015/1732, art. 2(b)

[^key-c91cfbacfa90c745e9331f0897c84224]: Words in s. 41A(2)(c) substituted (E.W.) (6.4.2010) by The Environmental Permitting (England and Wales) Regulations 2010 (S.I. 2010/675), reg. 1(1)(b), Sch. 26 para. 10(2) (with reg. 1(2), Sch. 4)

[^key-cdb6bf9b5bb010065d72acbfa2c5998f]: Sch. 4 para. 6 repealed (S.) (1.9.2018) by The Environmental Authorisations (Scotland) Regulations 2018 (S.S.I. 2018/219), reg. 1, sch. 7 para. 1 (with reg. 78, sch. 5 para. 2)

[^key-d00eb5a93111dbc5b9c99dde7792facb]: S. 56(7) inserted (1.10.2015) by Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 56; S.I. 2015/1630, art. 3(i)

[^key-d0614c9f6f91bd9d33af9380ee3bea47]: Words in s. 27 heading omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 15(a); S.I. 2025/937, art. 2(g)

[^key-d364326d9e283519db0f25dbebe961e9]: Words in s. 35(3) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(4); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-d4cc3a5db055112a58a00f12170929dd]: Words in s. 49(1) inserted (1.10.2015) by Consumer Rights Act 2015 (c. 15), s. 100(5), Sch. 6 para. 55; S.I. 2015/1630, art. 3(i)

[^key-dac5a87907c281eba10872a381d60e73]: Words in s. 45(1)(a) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 17(a); S.I. 2025/937, art. 2(g)

[^key-dee149c15b8cd9942c9afe8e3daa24c8]: Words in s. 63(2) inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 23(a) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-df25602866f3d3e5068b08ca441b1e39]: Sch. 1 para. 6A inserted (E.W.) (1.5.2022) by Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 24(3) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-e018649cc95b9af02b351311668c0dcd]: Words in s. 24(1) substituted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 13; S.I. 2025/937, art. 2(g)

[^key-e081b4e716545eb6c653d9fd6882b3a3]: Words in Sch. 1A para. 3(4) inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 4(b); S.I. 2025/937, art. 2(g)

[^key-e2af93f51212abeb6a0c2eb6fb0fe67b]: S. 16 modified (E.W.) (1.1.2017) by The Environmental Permitting (England and Wales) Regulations 2016 (S.I. 2016/1154), reg. 1(1), Sch. 23 paras. 1(3), 2 (with regs. 1(3), 77-79, Sch. 4)

[^key-e349e0d5a90593b2ec5520096af16437]: Words in s. 29 inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 16(b); S.I. 2025/937, art. 2(g)

[^key-e36157df0a1aa806d4be5a418b6a6aad]: Words in Sch. 1A heading inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 2; S.I. 2025/937, art. 2(g)

[^key-e7c328466fa7cadebd773e6e0b96080d]: Words in s. 42(6) substituted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 26(b); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-e825d70faeb7a9a169cb9c5c9abb2b14]: Words in s. 31(4)(b) substituted (1.4.2013) by The Natural Resources Body for Wales (Functions) Order 2013 (S.I. 2013/755), art. 1(2), Sch. 2 para. 343(2) (with Sch. 7)

[^key-e97f074b5058a722b0ee273207ae8c60]: Words in s. 41A(2)(a) inserted (S.) (30.6.2014) by Regulatory Reform (Scotland) Act 2014 (asp 3), s. 61(2), sch. 3 para. 4(6)(b)(i); S.S.I. 2014/160, art. 2(1)(2), sch.

[^key-eae60e76a17c80d1abff344a140c188f]: Words in s. 33(1) repealed (1.4.2015 for S.) by Pollution Prevention and Control Act 1999 (c. 24), s. 7(3), Sch. 3; S.S.I. 2015/74, art. 2(2)(d)

[^key-f193b41ddf6f4e84cea847a711b4db22]: Words in Sch. 1A para. 1 inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 3(b); S.I. 2025/937, art. 2(g)

[^key-f2916651d0f4063ce6df727330306e1b]: Words in s. 27(3) omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 15(c); S.I. 2025/937, art. 2(g)

[^key-f2b09d1cc0f437a40eaaafc00974dc7c]: Act modified (E.) (6.4.2010) by The Southampton Port Health Authority Order 2010 (S.I. 2010/1218), arts. 1(1), 4, Sch.

[^key-f33d2b415792786fcf52e8d9644e9601]: Ss. 21(A1)-(A4) omitted (1.5.2022) by virtue of Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 15(3) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-f366fd6514caebfdbd25a8495aaba395]: Words in Sch. 1A para. 4(6) inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 5(c); S.I. 2025/937, art. 2(g)

[^key-f6af7e887c966b47af1cbb0d49f6f1f2]: Words in s. 63(2) inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 20(a); S.I. 2025/937, art. 2(g)

[^key-f7772f9f1c4ff9af015e62a506fe459c]: Words in s. 35(3) repealed (1.4.2015 for S.) by Pollution Prevention and Control Act 1999 (c. 24), s. 7(3), Sch. 3; S.S.I. 2015/74, art. 2(2)(d)

[^key-fbe0ed9c008b9efaad528d5678036b9c]: Word in s. 29 omitted (E.W.) (1.5.2022) by virtue of Environment Act 2021 (c. 30), s. 147(3), Sch. 12 para. 22(a) (with s. 144, Sch. 12 para. 26); S.I. 2022/48, reg. 4(d)

[^key-fcfdea2c6c5ecca4440df921c9c6e227]: Sch. 2 para. 1 omitted (E.W.) (31.7.2025) by virtue of Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 9(a); S.I. 2025/937, art. 2(g)

[^key-fe503cd6edc7cb5b0ef476002f24cf6c]: Sch. 1A para. 4(7) inserted (E.W.) (31.7.2025) by Environment (Air Quality and Soundscapes) (Wales) Act 2024 (asc 2), s. 30(3), Sch. 1 para. 5(d); S.I. 2025/937, art. 2(g)

[^M_F_f5e8d94a-a696-4173-906e-701792c0542e]: Words in s. 35(3) inserted (21.3.2000 (E.W.) and 29.9.2000 (S.)) by 1999 c. 24, s. 6, Sch. 2 para. 11; S.I. 2000/800, art. 2; S.S.I. 2000/322, art. 2

[^M_F_2bad70ab-86e3-409e-aad9-446381f419db]: S. 16(4A)(4B) inserted (E.W. with application in relation to E.) (1.10.2023) by The Building Safety Act 2022 (Consequential Amendments etc.) Regulations 2023 (S.I. 2023/908), regs. 1(2), 16 (with reg. 17)

[^key-1d3a47340b1604f23033e8500d8a1614]: S. 16(4B): definition “application for building control approval” extended (W.) (1.7.2026) by The Building Safety Act 2022 (Consequential Amendments) (Wales) Regulations 2026 (W.S.I. 2026/55), regs. 1(2), 8(3) (with reg. 13)

[^key-d4803e5987f4de0bc17e2adc84bc8c8f]: Words in s. 16(4A) inserted (1.7.2026) by The Building Safety Act 2022 (Consequential Amendments) (Wales) Regulations 2026 (W.S.I. 2026/55), regs. 1(2), 8(2)(a)(i) (with reg. 13)

[^key-c6c78275ef9919ad4aaa11e64aa07c3f]: Words in s. 16(4B) inserted (1.7.2026) by The Building Safety Act 2022 (Consequential Amendments) (Wales) Regulations 2026 (W.S.I. 2026/55), regs. 1(2), 8(2)(b) (with reg. 13)

[^key-adb50fc5640bf1ffea5eac5a6096e67d]: Words in s. 16(4A)(b) inserted (1.7.2026) by The Building Safety Act 2022 (Consequential Amendments) (Wales) Regulations 2026 (W.S.I. 2026/55), regs. 1(2), 8(2)(a)(ii) (with reg. 13)