http://www.legislation.gov.uk/anaw/2017/1/schedule/23/paragraph/7/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) 2016I1I27Yn adran 39 (storio gwybodaeth etc. yn ddiogel), ar ôl “38” mewnosoder “neu 38A”.