21.—(1) For the purposes of Part V of the Act “child” includes a person aged 18 or over who falls within subsection (1B) of section 78 of the Act and references to “child” or “children” in Part V of the Act and in these Regulations shall be construed accordingly.
(2) Subject to paragraph (3), references to a child in subsection (1) of section 78 of the Act shall include references to a person (including a child) who was at any time (including a time before the coming into force of this paragraph)—
(a)A child ordinarily resident in Wales;
(b)A child to or in respect of whom services were provided in Wales by, or on behalf of or under arrangements with a person mentioned in Schedule 2B to the Act; or
(c)A child to or in respect of whom regulated children’s services were provided,
and references to “child” or “children” in Part V of the Act and in these Regulations shall be construed accordingly.
(3) References to “child” or “children” construed in accordance with paragraph (1) shall not, in addition, be construed in accordance with paragraph (2) in relation to any time before the coming into force of paragraph (1).