23.—(1) A person who has made a claim may amend it at any time by notice in writing received at an appropriate office before a determination has been made on a claim, and any claim so amended may be treated as if it had been so amended in the first instance.
(2) A person who has made a claim may withdraw it at any time before a determination has been made on it, by notice to the appropriate office, and any such notice of withdrawal shall have effect when it is received.
(3) The date on which the claim is made shall be—
(a)in the case of a claim which meets the requirements of regulation 22(1), the date on which it is received at the appropriate office, or
(b)in the case of a claim treated under regulation 22(3) as having been duly made, the date on which the claim was received in an appropriate office in the first place.
(4) In this regulation, the “appropriate office” means an office of the Department.
(5) In the case of a person who—
(a)ceases to be entitled to a qualifying benefit, and
(b)again becomes entitled to a qualifying benefit in the same period of entitlement to a qualifying benefit,
for the reference to 12 weeks in regulation 22(1)(b) there shall be substituted a reference to a period equal to the period falling between the last day of entitlement to a qualifying benefit mentioned at sub-paragraph (a) and the first day of entitlement to a qualifying benefit mentioned at sub-paragraph (b).
(6) Where the applicant proves there was good cause throughout the period from the expiry of the 12 weeks specified in regulation 22(1), for failure to claim the bonus within the specified time, the time for claiming the bonus shall be extended to the date on which the claim is made or to a period of 12 months, whichever is the shorter period.