The power could therefore have been used to make changes of any type to any provision of the current Welsh Tax Acts and related subordinate legislation.
i ymateb i benderfyniadau'r llysoedd/tribiwnlysoedd sy'n effeithio ar Ddeddfau Trethi Cymru neu a allai effeithio arnynt, neu unrhyw reoliadau a wneir oddi tanynt.