Section 2(4)(a) prevents the power in section 1 from being used to modify Part 2 of the Tax Collection and Management (Wales) Act 2016 and any regulations made under that Part.
Mae adran 2(4)(a) yn atal y pŵer yn adran 1 rhag cael ei ddefnyddio i addasu Rhan 2 o Ddeddf Casglu a Rheoli Trethi (Cymru) 2016 ac unrhyw reoliadau a wneir o dan y Rhan honno.