Pan wnaed y cyhoeddiad, nid oedd yna ddarpariaeth ddeddfwriaethol i’r Cynulliad na Gweinidogion Cymru allu gwneud trefniadau i ddarparu cymorth y dreth gyngor yng Nghymru. Ers hynny, mae pwerau deddfu sylfaenol wedi’u sicrhau drwy Ddeddf Cyllid Llywodraeth Leol 2012 Llywodraeth y DU, a dderbyniodd Gydsyniad Brenhinol ar 1 Tachwedd 2012.
At the time of the announcement, no legislative provision existed for the Assembly or Welsh Ministers to establish arrangements to provide council tax support in Wales. Primary legislative powers have since been secured through the UK government’s Local Government Finance Act 2012, which received Royal Assent on 1 November 2012.