In this Act—
“the Assembly” means the National Assembly for Wales;
“enactment” includes a Measure or Act of the Assembly and subordinate legislation (within the meaning of the Interpretation Act 1978);
“financial year” means the 12 months ending with 31 March;
“GOWA 2006” means the Government of Wales Act 2006;
“modifications” includes amendments, repeals and revocations;
“tax year” means a year beginning on 6 April and ending on the following 5 April.