18.—(1) The income and capital of a relevant person’s partner and, subject to paragraph (2) and to regulation 33 (modifications in respect of child and young person), the income of a child or young person which by virtue of regulation 17 is to be treated as income and capital of the relevant person shall be determined in accordance with the following provisions of this Part in like manner as for the relevant person; and any reference to the relevant person shall be construed for the purposes of this Part as if it were a reference to his partner or that child or young person.
(2) Regulations 26(2) and 28(2), so far as they relate to paragraphs 1 to 12 of Schedule 2 (sums to be disregarded in the determination of earnings), shall not apply to a child or young person.
(3) Where a relevant person or the partner of that person is married polygamously to two or more members of his household –
(a)the relevant person shall be treated as possessing capital and income belonging to each such member and the income of any child or young person who is one of that member’s family; and
(b)the income and capital of that member or, as the case may be, the income of that child or young person shall be determined in accordance with the following provisions of this Part in like manner as for the relevant person or, as the case may be, as for any child or young person who is a member of his family.