| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 2 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 3 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 3(2) | substituted | Rheoliadau Safonau’r Gymraeg (Rhif 7) 2018 | 2018 No. 441 | reg. 4(1) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 3(2)(a) | words inserted | Rheoliadau Rheoliadau Safonau’r Gymraeg (Rhif 1, Rhif 2, Rhif 4, Rhif 6 a Rhif 7) (Diwygio) 2025 | 2025 No. 339 | reg. 4(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 1 Pt. 1 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 1 Pt. 2 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 1 Pt. 3 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 2 Pt. 1 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 2 Pt. 2 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 3 Pt. 1 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 3 Pt. 2 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 3 Pt. 3 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 4 Pt. 1 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 4 Pt. 2 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 5 Pt. 1 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 5 Pt. 2 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 5 Pt. 3 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 5 Pt. 4 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 5 Pt. 5 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 5 Pt. 6 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 6 | coming into force | Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 6 | words inserted | Rheoliadau Safonau’r Gymraeg (Rhif 7) 2018 | 2018 No. 441 | reg. 4(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Safonau’r Gymraeg (Rhif 4) 2016 | 2016 No. 405 | Sch. 6 | words inserted | Rheoliadau Rheoliadau Safonau’r Gymraeg (Rhif 1, Rhif 2, Rhif 4, Rhif 6 a Rhif 7) (Diwygio) 2025 | 2025 No. 339 | reg. 4(3) | Not yet made to Welsh language versionApplied to English language version | |