57.—(1) For the purposes of regulation 54 (calculation of earnings derived from employed earner's employment), subject to paragraphs (2) to (5), where the period in respect of which a payment of earnings is made—
(a)does not exceed a week, the weekly amount is to be the amount of that payment;
(b)exceeds a week, the weekly amount is to be determined—
(i)in a case where that period is a month, by multiplying the amount of the payment by 12 and dividing the product by 52;
(ii)in a case where that period is three months, by multiplying the amount of the payment by four and dividing the product by 52;
(iii)in a case where that period is a year, by dividing the amount of the payment by 52;
(iv)in any other case, by multiplying the amount of the payment by seven and dividing the product by the number equal to the number of days in the period in respect of which it is made.
(2) Where a payment for a period not exceeding a week is treated under regulation 56(a) (date on which earnings are treated as paid) as paid before the first benefit week and a part is to be taken into account for some days only in that week (“the relevant days”), the amount to be taken into account for the relevant days is to be calculated by multiplying the amount of the payment by the number of relevant days and dividing the product by the number of days in the period in respect of which it is made.
(3) Where a payment is in respect of a period equal to or in excess of a week and a part is to be taken into account for some days only in a benefit week (“the relevant days”), the amount to be taken into account for the relevant days is, except where paragraph (4) applies, to be calculated by multiplying the amount of the payment by the number of relevant days and dividing the product by the number of days in the period in respect of which it is made.
(4) Except in the case of a payment which it has not been practicable to treat under regulation 56(b) as paid on the first day of the benefit week in which it is due to be paid, where a payment of income from a particular source is or has been paid regularly and that payment falls to be taken into account in the same benefit week as a payment of the same kind and from the same source, the amount of that income to be taken into account in any one benefit week is not to exceed the weekly amount determined under paragraph (1)(a) or (b), as the case may be, of the payment which under regulation 56(b) (date on which earnings are treated as paid) is treated as paid first.
(5) Where the amount of the claimant's earnings fluctuates and has changed more than once, or a claimant's regular pattern of work is such that they do not work every week, paragraphs (1) to (4) may be modified so that the weekly amount of their earnings is determined by reference to their average weekly earnings—
(a)if there is a recognisable cycle of work, over the period of one complete cycle (including, where the cycle involves periods in which the claimant does no work, those periods but disregarding any other absences);
(b)in any other case, over a period of five weeks or such other period as may, in the particular case, enable the claimant's average weekly earnings to be determined more accurately.