(1) This Act commences at the later of:
(a) the start of the day on which this Act receives the Royal Assent; and
(b) the start of the day after the last day on which any of the following receive the Royal Assent:
(i) the GST Act; and
(iii) the A New Tax System (Goods and Services Tax Administration) Act 1999 .
(2) To avoid doubt, this Act does not commence unless all of the Acts mentioned in subsection ( 1) have received the Royal Assent