18.—(1) In a case where the applicant is a person who satisfies at least one of the conditions set out in sub-paragraph (2), and the applicant’s net earnings equal or exceed the total of the amounts set out in sub-paragraph (3), the amount of the applicant’s earnings to be disregarded under paragraphs 4 to 12 is to be increased by £17.10.
(2) The conditions are that—
(a)the applicant, or if the applicant is a member of a couple, either the applicant or the other member of that couple, is a person to whom regulation 20(1)(c) of the Working Tax Credit Regulations applies; or
(b)the applicant—
(i)is, or if the applicant is a member of a couple, at least one member of that couple is, aged at least 25 and is engaged in remunerative work for on average not less than 30 hours per week;
(ii)is a member of a couple and—
(aa)at least one member of that couple, is engaged in remunerative work for on average not less than 16 hours per week; and
(bb)the applicant’s applicable amount includes a family premium under paragraph 4 of Schedule 1;
(iii)is a lone parent who is engaged in remunerative work for on average not less than 16 hours per week; or
(iv)is, or if the applicant is a member of a couple, at least one member of that couple is, engaged in remunerative work for on average not less than 16 hours per week and—
(aa)the applicant’s applicable amount includes a disability premium under paragraph 9 of Schedule 1 the work-related activity component under paragraph 21 of that Schedule or the support component under paragraph 22 of that Schedule; and
(bb)where the applicant is a member of a couple, at least one member of that couple satisfies the qualifying conditions for the disability premium or either of the components referred to in sub-head (aa) and is engaged in remunerative work for on average not less than 16 hours per week.
(3) The following are the amounts referred to in sub-paragraph (1)—
(a)the amount calculated as disregardable from the applicant’s earnings under paragraphs 4 to 12;
(b)the amount of child care charges calculated as deductible under regulation 27(1)(c) (calculation of income on a weekly basis); and
(c)£17.10.
(4) The provisions of regulation 6 (remunerative work) apply in determining whether or not a person works for on average not less than 30 hours per week, but as if the reference to 16 hours in paragraph (1) of that regulation was a reference to 30 hours.