| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Pt. 3 heading | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(10) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Pt. 8 heading | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(28) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1 | coming into force | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(4) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2 | coming into force | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words substituted | The Conservation of Habitats and Species Regulations 2017 | 2017 No. 1012 | Sch. 6 para. 78(2)(b) | Not yet made to Welsh language versionNot applicable to English language version |   Amendment to Welsh text |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words substituted | The Conservation of Habitats and Species Regulations 2017 | 2017 No. 1012 | Sch. 6 para. 78(2)(a) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words omitted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words substituted | Rheoliadau Deddf yr Amgylchedd Hanesyddol (Cymru) 2023 (Darpariaeth Ganlyniadol) (Is-ddeddfwriaeth) 2024 | 2024 No. 924 | reg. 111 | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words omitted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words omitted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(c)(i) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(c)(ii) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(d) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(e) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(f) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(g)(i) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(g)(ii) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(h) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(i) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words omitted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(j) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(k) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(l) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(3)(m) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(6) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(4)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 2(6) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(4)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 3 | coming into force | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 3 heading | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(5) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 3 | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(6)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 3 | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(6)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 4 | coming into force | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 4(1)(a) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(7)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 4(1)(b) | words substituted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(7)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 4(2)(b) | words inserted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(3)(a) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 4(2)(b) | words inserted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(3)(b) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5 | coming into force | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5(4)(a) | words substituted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(4)(a) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5(7) | omitted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(4)(b) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5(8)(b) | words substituted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(4)(c) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5(8)(b) | word substituted | Rheoliadau Deddf Cyfraith yr UE a Ddargedwir (Dirymu a Diwygio) 2023 (Diwygiadau Canlyniadol) (Cymru) 2023 | 2023 No. 1332 | reg. 19(2)(a) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5(13)(b)(ii) | words substituted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(4)(c) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 5(13)(b)(ii) | word substituted | Rheoliadau Deddf Cyfraith yr UE a Ddargedwir (Dirymu a Diwygio) 2023 (Diwygiadau Canlyniadol) (Cymru) 2023 | 2023 No. 1332 | reg. 19(2)(b) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6 | coming into force | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 1(2) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6(1) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(8)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6(3)(b) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(8)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6(4) | words substituted | Rheoliadau Asesiadau Amgylcheddol o Gynlluniau a Rhaglenni a’r Asesiadau Effaith Amgylcheddol (Diwygiadau Amrywiol) (Cymru) (Ymadael â’r UE) 2019 | 2019 No. 245 | reg. 6(5) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6(4) | word substituted | Rheoliadau Deddf Cyfraith yr UE a Ddargedwir (Dirymu a Diwygio) 2023 (Diwygiadau Canlyniadol) (Cymru) 2023 | 2023 No. 1332 | reg. 19(3) | Yes | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6(5) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(8)(c) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | reg. 6(6) | words inserted | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 12(8)(d) | Not yet made to Welsh language versionApplied to English language version | |