| The Management of Health and Safety at Work Regulations 1999 | 1999 No. 3242 | reg. 3 | modified by S.I. 2020/1609, reg. 16(4) (as inserted) | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(2)(b) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Swyddogaethau Awdurdodau Lleol etc.) (Cymru) 2020 | 2020 No. 1011 | reg. 3(1) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 3(2) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Swyddogaethau Awdurdodau Lleol etc.) (Cymru) 2020 | 2020 No. 1011 | reg. 6(2) | substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 3(3)(a) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Swyddogaethau Awdurdodau Lleol etc.) (Cymru) 2020 | 2020 No. 1011 | reg. 6(8) | omitted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 3(3)(b) | Yes | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Cymru) 2020 | 2020 No. 1237 | Regulations | revoked | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 4(a) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 2) (Cymru) 2020 | 2020 No. 1288 | reg. 7 | revoked | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 4(b) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws a Swyddogaethau Awdurdodau Lleol) (Diwygio) (Cymru) 2020 | 2020 No. 1409 | reg. 2 | revoked | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 4(c) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2020 | 2020 No. 1477 | reg. 4 | revoked | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 4(d) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Coronafeirws, Teithio Rhyngwladol a Chyfyngiadau) (Diwygio) (Rhif 3) (Cymru) 2020 | 2020 No. 1477 | reg. 5 | revoked | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 4(d) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 4) (Cymru) (Diwygio) 2020 | 2020 No. 1522 | Regulations | revoked | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 4(e) | Not yet made to Welsh language versionApplied to English language version | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 16(1)(za) | inserted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(2)(a) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 16(3)(4) | inserted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(2)(b) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 17(1) | substituted for reg. 17(1)(2) | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(3)(a) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 17(4) | word substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(3)(b) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 17A | inserted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(4) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 18(1) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(5) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 25(3)(a)(i) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(6) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | reg. 26 | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(7) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 1 para. 6(5)(e) | words omitted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(8) | Not applicable to Welsh language versionNot yet made to English language version | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 2 para. 6(5)(e) | words omitted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(9) | Not applicable to Welsh language versionNot yet made to English language version | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 3 para. 6(5)(e) | words omitted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(10) | Not applicable to Welsh language versionNot yet made to English language version | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 4 Pt. 3A | inserted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(11) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 1(1)(a) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(a)(i) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 1(2)(b) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(a)(ii) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 2(3)(a) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(b)(i) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 2(4)(b)(ii) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(b)(ii) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 2(4)(c) | words substituted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(b)(iii) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 3(3)(c) | words inserted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(c) | Yes | |
| Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) 2020 | 2020 No. 1609 | Sch. 8 para. 4(1)(b) | words inserted | Rheoliadau Diogelu Iechyd (Cyfyngiadau Coronafeirws) (Rhif 5) (Cymru) (Diwygio) 2021 | 2021 No. 57 | reg. 2(12)(d) | Yes | |