123.—(1) A periodical payment is to be treated as paid–
(a)in the case of a payment which is due to be made before the benefit week in which the claimant first became entitled to an income-based jobseeker’s allowance, on the day in the week in which it is due to be paid which corresponds to the first day of the benefit week;
(b)in any other case, on the first day of the benefit week in which it is due to be paid unless, having regard to the manner in which jobseeker’s allowance is due to be paid in the particular case, it would be more practicable to treat it as paid on the first day of a subsequent benefit week.
(2) Subject to paragraph (3), any other payment shall be treated as paid–
(a)in the case of a payment which is made before the benefit week in which the claimant first became entitled to an income-based jobseeker’s allowance, on the day in the week in which it is paid which corresponds to the first day of the benefit week;
(b)in any other case, on the first day of the benefit week in which it is paid unless, having regard to the manner in which jobseeker’s allowance is due to be paid in the particular case, it would be more practicable to treat it as paid on the first day of a subsequent benefit week.
(3) Any other payment paid on a date which falls within the period in respect of which a previous payment is taken into account, not being a periodical payment, is to be treated as paid on the first day following the end of that period.