| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol) (Cymru) 2020 | 2020 No. 574 | reg. 12F(1) | substituted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 5 | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol) (Cymru) 2020 | 2020 No. 574 | Sch. 3A | words inserted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 2 | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 11A heading | substituted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4(2)(a) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 11A(1)(a) | words substituted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4(2)(b)(i) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 11A(1)(b) | words substituted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4(2)(b)(ii) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 11A(1)(c) | words substituted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4(2)(b)(iii) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 11A(2) | words substituted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4(2)(c) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 11A(4) | omitted | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4(2)(d) | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 2 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 2 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 3 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 3 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 4 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 5 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 5 | coming into force | Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2021 | 2021 No. 66 | reg. 1(2) | Yes | |