1. Subject to paragraph 3, a member suspended under the Discipline Regulations who—
(a)is detained, in pursuance of a sentence of the court, in a prison or other institution to which the Prison Act (Northern Ireland) 1953(1) applies, or is in custody (whether in prison or elsewhere) between conviction by a court and sentence, or
(b)has absented himself from duty and whose whereabouts are unknown to the chief constable (or a deputy chief constable acting as chief constable),
shall not, by virtue of regulation 30, be entitled to pay in respect of his period in detention or custody or, as the case may be, in respect of the period during which his whereabouts are unknown as aforesaid.