http://www.legislation.gov.uk/anaw/2017/1/schedule/23/paragraph/67/welshDeddf Treth Trafodiadau Tir a Gwrthweithio Osgoi Trethi Datganoledig (Cymru) 2017cyStatute Law Database2024-08-13Expert Participation2024-07-12ATODLEN 23DIWYGIADAU I DDEDDF CASGLU A RHEOLI TRETHI (CYMRU) 2016I1I267Yn adran 189 (rheoliadau), yn is-adran (2), ar ôl “18(2)” mewnosoder “122(5),”.