responding to a decision of any court or tribunal which affects, or may affect, the operation of any of the Welsh Tax Acts or regulations made under those Acts.
Bydd gan lysoedd Cymru a Lloegr awdurdodaeth lwyr dros unrhyw hawliad sy'n deillio o ymweliad â'r Wefan neu ddefnydd o'r Gwasanaeth, neu'n gysylltiedig â hynny.