7. In a case where paragraphs 3, 5, 6 and 8 do not apply to the relevant person and he is one of a couple and a member of that couple is in employment, £10; but, notwithstanding regulation 17 (determination of income and capital of members of relevant person’s family and of a polygamous marriage), if this paragraph applies to a relevant person it shall not apply to his partner except where, and to the extent that, the earnings of the relevant person which are to be disregarded under this paragraph are less than £10.