(1) Section 590 of the Principal Act is amended in subsection (16) -
(a) in paragraph (b)(i) by the substitution of "section 617 (other than paragraphs (b) and (c) of subsection (1)), section 618 (with the omission of the words 'to which this section applies' in subsections (1)(a) and (2), of 'such' in subsection (1)(c) and of subsection (3)), section 619(2) (with the substitution for 'in the course of a disposal to which section 617 applies' of 'at a time when both were members of the group') and section 620(2) (with the omission of the words 'to which this section applies')" for "sections 617 to 620",
(b) in paragraph (b)(ii) by the insertion after "section 623" of "(apart from paragraphs (c) and (d) of subsection (2))".
(2) This section applies in cases in which section 617, 618, 619(2) or 620(2), as the case may be, have effect as amended by this Act.