| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | applied (with or without modifications) | Rheoliadau Datblygiadau o Arwyddocâd Cenedlaethol (Cymru) 2016 | 2016 No. 56 | reg. 41 Sch. 1-10 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | applied (with modifications) | Rheoliadau Datblygiadau o Arwyddocâd Cenedlaethol (Cymru) 2016 | 2016 No. 56 | Sch. 4 para. 3 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | applied (with modifications) | Rheoliadau Datblygiadau o Arwyddocâd Cenedlaethol (Cymru) 2016 | 2016 No. 56 | Sch. 5 para. 3 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | applied (with modifications) | Rheoliadau Datblygiadau o Arwyddocâd Cenedlaethol (Cymru) 2016 | 2016 No. 56 | Sch. 7 para. 3 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | applied (with modifications) | Rheoliadau Datblygiadau o Arwyddocâd Cenedlaethol (Cymru) 2016 | 2016 No. 56 | Sch. 9 para. 2 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | applied (with modifications) | Rheoliadau Datblygiadau o Arwyddocâd Cenedlaethol (Cymru) 2016 | 2016 No. 56 | Sch. 10 para. 2 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Order | revoked | Rheoliadau Deddf Seilwaith (Cymru) 2024 (Darpariaethau Canlyniadol, Darpariaeth Drosiannol, Darpariaeth Ddirymu a Darpariaeth Arbed) 2025 | 2025 No. 1192 | reg. 21(c) | Not yet | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 2 | words substituted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(2)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 2 | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(2)(b)(i) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 2 | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(2)(b)(ii) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 2 | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(2)(b)(iii) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 2 | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(2)(b)(iv) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 2 | words inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(2) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 8(1)(b)(ix) | inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(3)(c) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 8(1)(b)(vii) | word omitted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(3)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 8(1)(b)(viii) | word inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(3)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 12(1)(b)(ix) | word omitted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(4)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 12(1)(b)(x) | word inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(4)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 12(1)(b)(xi) | inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | art. 2(4)(c) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 12(6A) | inserted | Gorchymyn Ceisiadau Cynllunio (Addasiadau a Datgymhwyso Dros Dro) (Cymru) (Coronafeirws) 2020 | 2020 No. 514 | art. 4 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 12(6A)(b) | words substituted | Gorchymyn Ceisiadau Cynllunio (Addasiadau a Datgymhwyso Dros Dro) (Rhif 2) (Cymru) (Coronafeirws) 2020 | 2020 No. 1004 | art. 3(2) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 12(6A)(b) | words substituted | Gorchymyn Ceisiadau Cynllunio (Addasiadau a Datgymhwyso Dros Dro) (Rhif 3) (Cymru) (Coronafeirws) 2020 | 2020 No. 1516 | art. 3(2) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 18(3)(ba) | inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(3)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 18(3)(c) | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(3)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 18(4) | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(3)(c) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 19(2) | words substituted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(4)(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 19(5) | words substituted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(4)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 22(4)(b) | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(5) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 23(2)(a) | words substituted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(6) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | art. 29(4)(5) | omitted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(7) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 1 | substituted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 1 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 2 | substituted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 2 | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 4 form | words inserted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(8) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 4 form | word substituted | Rheoliadau Cynllunio Gwlad a Thref (Asesu Effeithiau Amgylcheddol) (Cymru) 2017 | 2017 No. 567 | Sch. 9 para. 2(8) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 3 para. 2(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words omitted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 3 para. 2(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 3 para. 2(c) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 3 para. 3(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words inserted | Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) (Diwygio) 2019 | 2019 No. 290 | Sch. 3 para. 3(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Gweithdrefn Ddatblygu (Ymgyngoreion) (Cymru) (Diwygiadau Amrywiol) 2021 | 2021 No. 1189 | art. 3(2)(a) | Not yet made to Welsh language versionNot applicable to English language version |   The amending S.I. 2021/1189, art. 3(2)(a) is omitted by virtue of S.I. 2021/1297, art. 2(3)(c) before it comes into force |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words inserted | Gorchymyn Gweithdrefn Ddatblygu (Ymgyngoreion) (Cymru) (Diwygiadau Amrywiol) 2021 | 2021 No. 1189 | art. 3(2)(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Gweithdrefn Ddatblygu (Ymgyngoreion) (Cymru) (Diwygiadau Amrywiol) 2021 | 2021 No. 1189 | art. 3(3) | Not yet made to Welsh language versionNot applicable to English language version |   The amending S.I. 2021/1189, art. 3(3) is omitted by virtue of S.I. 2021/1297, art. 2(3)(d) before it comes into force |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Rheoliadau Deddf yr Amgylchedd Hanesyddol (Cymru) 2023 (Darpariaeth Ganlyniadol) (Is-ddeddfwriaeth) 2024 | 2024 No. 924 | reg. 76(a) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Rheoliadau Deddf yr Amgylchedd Hanesyddol (Cymru) 2023 (Darpariaeth Ganlyniadol) (Is-ddeddfwriaeth) 2024 | 2024 No. 924 | reg. 76(b) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Rheoliadau’r Amgylchedd Hanesyddol (Diwygiadau Amrywiol) (Cymru) 2024 | 2024 No. 1258 | reg. 7 | Not yet made to Welsh language versionNot applicable to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Gweithdrefn Ddatblygu (Ymgyngoreion) (Cymru) (Diwygiadau Amrywiol) 2025 | 2025 No. 400 | art. 3(2) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Gweithdrefn Ddatblygu (Ymgyngoreion) (Cymru) (Diwygiadau Amrywiol) 2025 | 2025 No. 400 | art. 3(3) | Not yet made to Welsh language versionApplied to English language version | |
| Gorchymyn Datblygiadau o Arwyddocâd Cenedlaethol (Gweithdrefn) (Cymru) 2016 | 2016 No. 55 | Sch. 5 | words substituted | Gorchymyn Diwygio Is-ddeddfwriaeth (Maint Glanio Lleiaf a Chywiriadau Amrywiol) (Cymru) 2025 | 2025 No. 815 | art. 15(2) | Not yet made to Welsh language versionApplied to English language version | |