The Income Support (General) Regulations 1987

Polygamous marriages

18.  Subject to regulations 19 to 22 and 70 (applicable amounts in other cases and reductions in applicable amounts and urgent cases), where a claimant is a member of a polygamous marriage his weekly applicable amount shall be the aggregate of such of the following amounts as may apply in his case:

(a) the highest amount applicable to him and one of his partners determined in accordance with sub-paragraph (3) of paragraph 1 of Schedule 2 as if he and that partner were a couple;

(b) an amount equal to the difference between the amounts specified in sub-paragraphs (3) (b) and (1) (c) of paragraph 1 of Schedule 2 in respect of each of his other partners;(c)an amount determined in accordance with paragraph 2 of Schedule 2 (applicable amounts) in respect of any child or young person for whom he or a partner of his is responsible and who is a member of the same household except a child or young person whose capital, if calculated in accordance with Part V in like manner as for the claimant, except where otherwise provided, would exceed £3,000;

(d) if he or another partner of the polygamous marriage is responsible for a child or young person who is a member of the same household, the amount specified in Part II of Schedule 2 (family premiums);

(e) the amount of any premiums which may be applicable to him determined in accordance with Parts III and IV of Schedule 2 (premiums);

(f) any amounts determined in accordance with Schedule 3 (housing costs) which may be applicable to him in respect of mortgage interest payments or such other housing costs as are prescribed in that Schedule.