| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | Act | power to amend conferred | Deddf Deddfau Trethi Cymru etc. (Pŵer i Addasu) 2022 | 2022 asc 2 | s. 1 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 1 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 1 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 2 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 2 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 3 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 3 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 4 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 4 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 5 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 5 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 6 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 6 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 7 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 7 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 8 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 8 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 9 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 9(1)-(5)(7)-(9) | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 9(6) | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 1) 2017 | 2017 No. 953 | art. 2(a) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 10 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 10 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 10 | applied (with modifications) | Rheoliadau Treth Trafodiadau Tir (Darpariaethau Trosiannol) (Cymru) 2018 | 2018 No. 126 | reg. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 10 | applied (with modifications) | Rheoliadau Treth Trafodiadau Tir (Darpariaethau Trosiannol) (Cymru) 2018 | 2018 No. 126 | reg. 4 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 10(5)(b) | excluded (temp.) | Rheoliadau Treth Trafodiadau Tir (Amrywio Dros Dro Gyfraddau a Bandiau ar gyfer Trafodiadau Eiddo Preswyl) (Cymru) 2020 | 2020 No. 794 | reg. 2(3) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 11 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 11 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 12 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 12 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 13 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 13 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 14 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 14 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 15 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 15 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 16 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 16 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 17 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 17 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 18 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 18 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 19 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 19 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 20 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 20 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 21 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 21 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 22 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 22 | coming into force | Gorchymyn Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 (Cychwyn Rhif 2) 2018 | 2018 No. 34 | art. 3 | Yes | |
| Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 23 | coming into force | Deddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017 | 2017 anaw 1 | s. 81(2) | Yes | |