6.—(1) For the purposes of section 35A(4) of the Contributions and Benefits Act, a woman’s average weekly amount of specified payments shall, subject to paragraph (2), be determined—
(a)in a case to which regulation 5(1) applies, by dividing by 13 the payments made or treated as made in accordance with these Regulations which fall within the specified period; or
(b)in a case to which regulation 5(2) applies, by dividing by 13 the payments made or treated as made in accordance with these Regulations in the first 13 such weeks which fall within the specified period.
(2) In any case where a woman receives a back-dated pay increase after the end of the period specified in regulation 5 which includes a sum in respect of any week falling within that period, her average weekly amount of specified payments shall be determined as if such sum had been paid in that week.