21(1)Subject to what follows, the amendments made by paragraphs 14 to 20 have effect for accounting periods beginning on or after the day on which this Act is passed.
(2)Sections 528B, 562C and 573B have no effect in relation to—
(a)groups of companies in respect of which notices are given under section 523 specifying a date which is before the day on which this Act is passed, or
(b)companies which give notices under section 524 specifying a date which is before the day on which this Act is passed.