Planning (Hazardous Substances) Act 1990

[^key-de05b03ffce2c350b768316bfd5438ab]: Words in s. 29(3) substituted (1.4.2014) by The Energy Act 2013 (Office for Nuclear Regulation) (Consequential Amendments, Transitional Provisions and Savings) Order 2014 (S.I. 2014/469), art. 1(2), Sch. 2 para. 10(3) (with Sch. 4)

[^key-ddfc3e96cb5283b57bd831a836b6f43d]: Words in s. 29(4) substituted (1.4.2014) by The Energy Act 2013 (Office for Nuclear Regulation) (Consequential Amendments, Transitional Provisions and Savings) Order 2014 (S.I. 2014/469), art. 1(2), Sch. 2 para. 10(4) (with Sch. 4)

[^key-dff1c7d6ed37496d6c1e569cba4e8476]: Words in s. 29(5) substituted (1.4.2014) by The Energy Act 2013 (Office for Nuclear Regulation) (Consequential Amendments, Transitional Provisions and Savings) Order 2014 (S.I. 2014/469), art. 1(2), Sch. 2 para. 10(5) (with Sch. 4)

[^key-307ef9858e17b1c7fc4f091512adeb37]: S. 29(6) substituted (1.4.2014) by The Energy Act 2013 (Office for Nuclear Regulation) (Consequential Amendments, Transitional Provisions and Savings) Order 2014 (S.I. 2014/469), art. 1(2), Sch. 2 para. 10(6) (with Sch. 4)

[^key-87e7297a2cbc71e1460f08b87ae74270]: Words in s. 39(1) inserted (1.4.2014) by The Energy Act 2013 (Office for Nuclear Regulation) (Consequential Amendments, Transitional Provisions and Savings) Order 2014 (S.I. 2014/469), art. 1(2), Sch. 2 para. 10(7) (with Sch. 4)

[^key-3e9869e89b2746a1a03574a219f392f7]: S. 21B inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), arts. 1(2), 2(3)

[^key-e0b4ee8272047ac6733a1ab13779960f]: S. 20(4B) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), art. 1(2), Sch. 1 para. 25

[^key-2998aff48e6306b9b1a2054f639ab33f]: S. 21(5B) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), art. 1(2), Sch. 1 para. 26

[^key-52e6f893041555d754fe1b3003e2ba12]: Words in s. 25(1)(c) substituted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), art. 1(2), Sch. 1 para. 27(b)

[^M_F_cbabd64f-6915-41ee-9bec-64a67854dd96]: Words in Sch. para. 3(5) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014, Sch. 1 para. 29(5).

[^key-0771b2e87a986b6278dda7a7daf9855f]: Words in Sch. para. 6(2)(a) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), art. 1(2), Sch. 1 para. 29(6)(b)

[^key-e3c7b7bd604dc40954d9d3f30f904602]: Words in Sch. para. 6(3)(a) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), art. 1(2), Sch. 1 para. 29(6)(b)

[^M_F_38186bda-141f-411d-c373-bba7f13ed5a1]: Sch. para. 2(4B) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014, art. 1(2), Sch. 1 para. 29(2).

[^M_F_3cce84da-5d80-4cd5-ea9e-887a8d57d8d8]: Sch. para. 2(10) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014, art. 1(2), Sch. 1 para. 29(3).

[^M_F_9800ae9b-800c-454c-eabd-71da3351df86]: Sch. para. 3(4C)(4D) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014, Sch. 1 para. 29(4).

[^M_F_bcbd3664-0824-4b18-ff31-b0f2624abd19]: Sch. para. 6(1B) inserted (11.11.2014) by The Town and Country Planning (Determination of Procedure) (Wales) Order 2014 (S.I. 2014/2773), art. 1(2), Sch. 1 para. 29(6)(a)

[^key-8429abdba7e87c9848f38afef4349da4]: Words in s. 23(4) substituted (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. 20 (with reg. 5(1))

[^M_F_0fa58c9e-1bc7-44a6-b092-6a8f3ebad46f]: S. 32 repealed (6.8.2004 for specified purposes, 7.6.2006 in so far as not already in force) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 3 para. 12(2), Sch. 9 (with s. 111); S.I. 2004/2097, art. 2; S.I. 2006/1281, art. 2(c)(f)

[^M_F_c4ce58b7-9004-4b12-e043-44779d01dccd]: S. 31(5)(aa) inserted (6.8.2004 for specified purposes, 7.6.2006 in so far as not already in force) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 3 para. 8(4) (with s. 111); S.I. 2004/2097, art. 2; S.I. 2006/1281, art. 2(c)

[^M_F_0f7e27fc-fc7f-456f-b7dc-42085b66b382]: S. 31(5)(e) inserted (6.8.2004 for specified purposes, 7.6.2006 in so far as not already in force) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 3 para. 8(5) (with s. 111); S.I. 2004/2097, art. 2; S.I. 2006/1281, art. 2(c)

[^M_F_61243d11-639d-4dfe-a195-1ba04652b79c]: S. 31(7)-(9) inserted (6.8.2004 for specified purposes, 7.6.2006 in so far as not already in force) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 3 para. 8(6) (with s. 111); S.I. 2004/2097, art. 2; S.I. 2006/1281, art. 2(c)

[^M_F_0502968d-7951-4bd8-c7a6-e0f0708cd70a]: Words in s. 31(3) substituted (6.8.2004 for specified purposes, 7.6.2006 in so far as not already in force) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 3 para. 8(3) (with s. 111); S.I. 2004/2097, art. 2; S.I. 2006/1281, art. 2(c)

[^M_F_555c736f-57b4-49d6-817e-47d7363925d9]: S. 31(1)(2) repealed (6.8.2004 for specified purposes, 7.6.2006 in so far as not already in force) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 3 para. 8(2), Sch. 9 (with s. 111); S.I. 2004/2097, art. 2; S.I. 2006/1281, art. 2(c)(f)

[^key-664f895f61cb14190b48c05b3c04fe66]: S. 25 modified (E.) (1.6.2015) by The Planning (Hazardous Substances) Regulations 2015 (S.I. 2015/627), regs. 1(1), 19(2) (with reg. 34)

[^key-a7bf7652cb7c2ddcfd03e700fe93b2ce]: S. 9 applied in part (E.) (1.6.2015) by The Planning (Hazardous Substances) Regulations 2015 (S.I. 2015/627), regs. 1(1), 23(4) (with reg. 34)

[^key-db086a8656e3c79c50469ca93e75d15d]: S. 22 modified (E.) (1.6.2015) by The Planning (Hazardous Substances) Regulations 2015 (S.I. 2015/627), regs. 1(1), 23(5) (with reg. 34)

[^key-c6cfa9bf12b9518400eb9807c1c2f1ed]: S. 25(2) modified (W.) (4.9.2015) by The Planning (Hazardous Substances) (Wales) Regulations 2015 (S.I. 2015/1597), regs. 1(1), 20(2) (with reg. 36)

[^key-1a8820ae32aadcae7052f277393083e1]: S. 9 applied (W.) (4.9.2015) by The Planning (Hazardous Substances) (Wales) Regulations 2015 (S.I. 2015/1597), regs. 1(1), 25(4) (with reg. 36)

[^key-372a5d7569378fd453bf6eebe5c65339]: S. 22(2A)-(2C) inserted (26.10.2015) by Criminal Justice and Courts Act 2015 (c. 2), s. 95(1), Sch. 16 para. 7(3); S.I. 2015/1778, art. 3(b)(ii) (with art. 4(a))

[^key-c0a2d3fbc1650ce6c861186b2f88f9f3]: Words in s. 22(1)(2) omitted (26.10.2015) by virtue of Criminal Justice and Courts Act 2015 (c. 2), s. 95(1), Sch. 16 para. 7(2); S.I. 2015/1778, art. 3(b)(ii) (with art. 4(a))

[^key-6f43e8c3b09e49da3fff400383afc9c7]: Words in s. 22(3) inserted (26.10.2015) by Criminal Justice and Courts Act 2015 (c. 2), s. 95(1), Sch. 16 para. 7(4); S.I. 2015/1778, art. 3(b)(ii) (with art. 4(a))

[^key-1010bc5493cab22e3d439396824ee9c1]: Words in s. 25(5) inserted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 24; S.I. 2016/52, art. 4(i) (with art. 17)

[^key-3eb4b76eee8e36da4a543819931e7fa6]: Word in s. 37(2) inserted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 25(2)(a); S.I. 2016/52, art. 4(j) (with art. 17)

[^key-296c2d04cc9ba37842aa0008691d8f26]: Words in s. 37(2) inserted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 25(2)(b); S.I. 2016/52, art. 4(j) (with art. 17)

[^key-7a25e095eb0193162c77c2f78103696f]: Words in Sch. para. 6(4) inserted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 26(a); S.I. 2016/52, art. 4(k) (with art. 17)

[^key-8e4850802670c62869aaacbbf34d0f19]: Sch. para. 6(4A) inserted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 26(b); S.I. 2016/52, art. 4(k) (with art. 17)

[^key-b9388c2962a49ab03b73dddf187d394c]: Words in Sch. para. 6(5) substituted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 26(c); S.I. 2016/52, art. 4(k) (with art. 17)

[^key-f0018af0457152c4fe57a96613bf3ed8]: Words in Sch. para. 6(8) inserted (6.9.2015 for specified purposes, 1.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 26(d); S.I. 2016/52, art. 4(k) (with art. 17)

[^key-1dd5c36bbb0cedbf4e4da5a27944d38a]: S. 3(5C) inserted (6.9.2015 for specified purposes, 16.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), ss. 40, 58(2)(b)(4)(b); S.I. 2015/1987, art. 4(b)

[^key-34a1aead2f7de7edda225f275f24eb2c]: Words in s. 9(2)(c) inserted (27.3.2017) by The Housing and Planning Act 2016 (Permission in Principle etc) (Miscellaneous Amendments) (England) Regulations 2017 (S.I. 2017/276), regs. 1, 4(2)

[^key-7a08afbc59ae638ea29a5c1ce2e70a26]: Words in s. 37(2) inserted (6.9.2015 for specified purposes, 5.5.2017 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), ss. 39(4), 58(2)(b)(4)(b); S.I. 2017/546, art. 3(a)

[^key-c9f12f796d92e1151c7ea77da0891dcf]: S. 21(3E)(3F) inserted (6.9.2015 for specified purposes, 5.5.2017 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), ss. 47(4), 58(2)(b)(4)(b); S.I. 2017/546, art. 3(b) (with art. 4)

[^key-f34429f406347f57245c00b8a3a2a4b5]: Word in s. 37(2) inserted (6.9.2015 for specified purposes, 5.5.2017 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 25(2)(c); S.I. 2017/546, art. 3(e)

[^key-7da1b9e8dd7b6da6c294384604d39f82]: Words in s. 37(2) inserted (6.9.2015 for specified purposes, 5.5.2017 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 25(2)(d); S.I. 2017/546, art. 3(e)

[^key-dda30ac4706190f7f8ec2c0154edec02]: S. 37(4) omitted (6.9.2015 for specified purposes, 5.5.2017 in so far as not already in force) by virtue of Planning (Wales) Act 2015 (anaw 4), s. 58(2)(b)(4)(b), Sch. 5 para. 25(3); S.I. 2017/546, art. 3(e)

[^key-5bdd6d90a861090981afce3db9b3b7a1]: S. 21B(7)(c) inserted (5.5.2017) by The Planning (Hazardous Substances) (Determination of Procedure) (Wales) Order 2017 (S.I. 2017/529), art. 2(2), reg. 1(2)

[^key-bcc7440f89b88f27230bebb4d04f2d9c]: S. 38(1) functions made exercisable concurrently or jointly with the Welsh Ministers by 2006 c. 32, Sch. 3A para. 1 (as inserted (1.4.2018) by Wales Act 2017 (c. 4), s. 71(4), Sch. 4 para. 1 (with Sch. 7 paras. 1, 6); S.I. 2017/1179, reg. 3(p))

[^key-f898b59fc37289937bb94908401772de]: Sch. para. 6(6) functions made exercisable concurrently or jointly with the Welsh Ministers by 2006 c. 32, Sch. 3A para. 1 (as inserted (1.4.2018) by Wales Act 2017 (c. 4), s. 71(4), Sch. 4 para. 1 (with Sch. 7 paras. 1, 6); S.I. 2017/1179, reg. 3(p))

[^key-8477aed4bc2512f3b11562c42ef38dca]: S. 36B functions transferred (24.5.2018) by The Welsh Ministers (Transfer of Functions) Order 2018 (S.I. 2018/644), arts. 1(1), 26

[^key-c5d64ac2daefefcc6a30132f137f5bba]: Words in s. 21A(2) substituted (22.7.2020) by Business and Planning Act 2020 (c. 16), ss. 20(3)(a), 25(3)(c)

[^key-fcbb3b6a6b27a58528b89b2b12756235]: Word in s. 21A(2) omitted (22.7.2020) by virtue of Business and Planning Act 2020 (c. 16), ss. 20(3)(b), 25(3)(c)

[^key-7362ff04b9665ad1e1915a4d10a04d1b]: Words in s. 40 heading inserted (26.12.2023) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 130(6)(a), 255(3)(a) (with s. 247)

[^key-219249b6313b598c7bb37a3650b6866c]: Words in s. 5(3) substituted (26.12.2023) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 130(7), 255(3)(a) (with s. 247)

[^key-8987e1681dc95852d9c791e42f4e8e8f]: S. 21A(9)(a) omitted (26.12.2023) by virtue of Levelling-up and Regeneration Act 2023 (c. 55), ss. 130(8)(a), 255(3)(a) (with s. 247)

[^key-7f87d174050038f8665af1fa9505e1b4]: S. 40(5) inserted (26.12.2023) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 130(6)(b), 255(3)(a) (with s. 247)

[^key-107b2c450fe76066f5562338a209776b]: S. 21B(9)(a) omitted (26.12.2023) by virtue of Levelling-up and Regeneration Act 2023 (c. 55), ss. 130(8)(b), 255(3)(a) (with s. 247)

[^key-869845684468ead43ea2f99ff05639f4]: S. 21A inserted (6.4.2009 for E.W. for specified purposes, 25.4.2024 for specified purposes) by Planning Act 2008 (c. 29), ss. 196(3), 241(8) (with s. 226); S.I. 2009/400, art. 3(j) (with art. 6(2)); S.I. 2024/452, reg. 2(a)

[^key-b04981bac4d208c1913fc898b447f79f]: S. 10(4) inserted (25.4.2024) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 124(6), 255(3)(b) (with s. 247); S.I. 2024/452, reg. 3(i)

[^key-f1b5594c442710e8442a65cd9ffb8f5b]: S. 37(5) inserted (25.4.2024) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 124(7)(b), 255(3)(b) (with s. 247); S.I. 2024/452, reg. 3(i)

[^key-86d87c28df7ac76f4737367026b8532b]: Words in s. 37(2) inserted (25.4.2024) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 124(7)(a), 255(3)(b) (with s. 247); S.I. 2024/452, reg. 3(i)

[^key-0d0e1e2dff97409983a34011c322c0ee]: Words in Sch. para. 7(2) substituted (30.10.2024) by The Transfer of Functions (Secretary of State for Housing, Communities and Local Government) Order 2024 (S.I. 2024/991), art. 1(2), Sch. para. 5 (with art. 7)

[^key-a47bba50bac7c56212af6bdc907648a4]: Words in s. 3(5C) omitted (W.) (10.9.2025) by virtue of Legislation (Procedure, Publication and Repeals) (Wales) Act 2025 (asc 3), s. 9(2)(d), Sch. 1 para. 8

[^key-96aabf82f9e2cb868f0de5e153c035aa]: Words in s. 9(2)(c) inserted (15.12.2025) by Infrastructure (Wales) Act 2024 (asc 3), s. 147(2), Sch. 3 para. 5(2) (with s. 84(5)); S.I. 2025/698, art. 3(l)

[^key-dca935779b2d4bb8110123b040bbd7db]: Words in s. 10(1) inserted (15.12.2025) by Infrastructure (Wales) Act 2024 (asc 3), s. 147(2), Sch. 3 para. 5(3) (with s. 84(5)); S.I. 2025/698, art. 3(l)

[^key-688475a32fa38f4fa491243ea8d7b851]: S. 12(2C) inserted (15.12.2025) by Infrastructure (Wales) Act 2024 (asc 3), s. 147(2), Sch. 3 para. 5(4) (with s. 84(5)); S.I. 2025/698, art. 3(l)

[^key-7e2b14d49f07a46d30e7e2499b26b4ce]: Words in s. 14(2)(b) inserted (15.12.2025) by Infrastructure (Wales) Act 2024 (asc 3), s. 147(2), Sch. 3 para. 5(5) (with s. 84(5)); S.I. 2025/698, art. 3(l)

[^key-c695560c890afa4c785a9fe6f50b69c1]: Words in s. 39 inserted (15.12.2025) by Infrastructure (Wales) Act 2024 (asc 3), s. 147(2), Sch. 3 para. 5(6) (with s. 84(5)); S.I. 2025/698, art. 3(l)

[^key-cd3a1c629a0b1d9068d4cace8aafd33b]: Word in s. 12(3) substituted (16.12.2025) by The Infrastructure (Wales) Act 2024 (Consequential Amendments) Order 2025 (S.I. 2025/1330), arts. 1(3), 3

30C

• (1) No act or omission done or suffered by or on behalf of the Crown constitutes an offence under this Act.

• (2) A local planning authority must not take any step for the purposes of enforcement in relation to Crown land unless it has the consent of the appropriate authority.

• (3) The appropriate authority may give consent under subsection (2) subject to such conditions as it thinks appropriate.

• (4) A step taken for the purposes of enforcement is anything done in connection with the enforcement of anything required to be done or prohibited by or under this Act.

• (5) A step taken for the purposes of enforcement includes—

• (a) entering land;

• (b) bringing proceedings;

• (c) the making of an application.

• (6) A step taken for the purposes of enforcement does not include—

• (a) service of a notice;

• (b) the making of an order (other than by a court).

30D

• (1) Subsection (2) applies to the extent that an interest in land is a Crown interest or a Duchy interest.

• (2) Anything which requires or is permitted to be done by or in relation to the owner of the interest in land must be done by or in relation to the appropriate authority.

• (3) An interest in land includes an interest only as occupier of the land.

36C

• (1) Section 36 applies to Crown land subject to the following modifications.

• (2) A person must not enter Crown land unless he has the relevant permission.

• (3) Relevant permission is the permission of—

• (a) a person appearing to the person seeking entry to the land to be entitled to give it, or

• (b) the appropriate authority.

• (4) Section 36B does not apply to anything done by virtue of this section.

• (5) “Appropriate authority” must be construed in accordance with section 31(5).

21A

• (1) The Secretary of State must make a determination as to the procedure by which proceedings to which this section applies are to be considered.

• (2) A determination under subsection (1) must provide for the proceedings to be considered in such one or more of the following ways as appear to the Secretary of State to be ... appropriate—

• (a) at a local inquiry;

• (b) at a hearing;

• (c) on the basis of representations in writing.

• (3) The Secretary of State must make a determination under subsection (1) in respect of proceedings to which this section applies before the end of the prescribed period.

• (4) A determination under subsection (1) may be varied by a subsequent determination under that subsection at any time before the proceedings are determined.

• (5) The Secretary of State must notify the appellant or applicant (as the case may be) and the hazardous substances authority of any determination made under subsection (1).

• (6) The Secretary of State must publish the criteria that are to be applied in making determinations under subsection (1).

• (7) This section applies to—

• (a) an application referred to the Secretary of State under section 20 instead of being dealt with by a hazardous substances authority in England;

• (b) an appeal under section 21 against a decision of a hazardous substances authority in England.

• (8) The Secretary of State may by order amend subsection (7) to—

• (a) add proceedings under this Act to, or remove proceedings under this Act from, the list of proceedings to which this section applies, or

• (b) otherwise modify the descriptions of proceedings under this Act to which this section applies.

• (9) An order under subsection (8) may—

• (a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• (b) amend, repeal or revoke any provision made by or under this Act or by or under any other Act.

• (10) The power to make an order under subsection (8) is exercisable by statutory instrument.

• (11) No order may be made under subsection (8) unless a draft of the instrument containing the order has been laid before, and approved by resolution of, each House of Parliament.

21B

• (1) The Welsh Ministers must make a determination as to the procedure by which proceedings to which this section applies are to be considered.

• (2) A determination under subsection (1) must provide for the proceedings to be considered in such one or more of the following ways as appear to the Welsh Ministers to be appropriate—

• (a) at a local inquiry;

• (b) at a hearing;

• (c) on the basis of representations in writing.

• (3) The Welsh Ministers must make a determination under subsection (1) in respect of proceedings to which this section applies before the end of the prescribed period.

• (4) A determination under subsection (1) may be varied by a subsequent determination under that subsection at any time before the proceedings are determined.

• (5) The Welsh Ministers must notify the appellant or applicant (as the case may be) and the hazardous substances authority of any determination made under subsection (1).

• (6) The Welsh Ministers must publish the criteria which are to be applied in making determinations under subsection (1).

• (7) This section applies to—

• (a) an application referred to the Welsh Ministers under section 20;

• (b) an appeal to the Welsh Ministers under section 21.

• (c) an appeal to the Welsh Ministers under section 174 of the principal Act (appeal against enforcement notice) as applied by regulation 16 of, and Part 1 of Schedule 4 to, the Planning (Hazardous Substances) (Wales) Regulations 2015 (S.I. 2015/1597 (W. 196)) (appeals against hazardous substances contravention notices).

• (8) The Welsh Ministers may by order amend subsection (7) to—

• (a) add proceedings under this Act to, or remove proceedings under this Act from, the list of proceedings to which this section applies; or

• (b) otherwise modify the descriptions of proceedings under this Act to which this section applies.

• (9) An order under subsection (8) may—

• (a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• (b) amend, repeal or revoke any provision made by or under this Act or by or under any other Act.

• (10) No order may be made by the Welsh Ministers under subsection (8) unless a draft of the instrument containing the order has been laid before, and approved by resolution of the National Assembly for Wales.