http://www.legislation.gov.uk/anaw/2017/1/schedule/23/paragraph/20/welshDeddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017cyStatute Law Database2024-05-15Expert Participation2022-09-09ATODLEN 23DIWYGIADAU I DDEDDF CASGLU A RHEOLI TRETHI (CYMRU) 2016I1I220Yn adran 61 (y weithdrefn asesu), hepgorer is-adran (3).