25.—(1) Subject to the provisions of this regulation, the Secretary of State shall determine the circumstances and manner in which a member of a police force shall be compensated in respect of time—
(a)for which he remains on duty after his tour of duty ends, or
(b)for which he is recalled between two tours of duty, or
(c)which forms part of a tour of duty which he is required to begin earlier than the rostered time without due notice and on a day when he has already completed his normal daily period of duty;
and such time is referred to in these Regulations as “overtime”.
(2) For the purposes of this regulation—
“due notice” means notice given at least 8 hours before the revised starting time of the rostered tour of duty in question;
“normal daily period of duty” shall be construed in accordance with regulation 22;
“recall” does not include a warning to be in readiness for duty if required; and
“tour of duty”, in relation to a member of a police force for whom variable shift arrangements are in operation under regulation 22(1)(c), means rostered shift.
(3) In making a determination under paragraph (1), the Secretary of State may confer on the chief officer discretion—
(a)to fix the day on which a period commences for the purposes of the determination;
(b)to fix the period within which time off in compensation for overtime is to be granted;
(c)to allow time in addition to that specified in the determination to be taken into account in computing any period of overtime.