s 303 Power of service policeman to arrest person unlawfully at large
(1) A person who has been sentenced to service detention and who is unlawfully at large— (a) may be arrested by a service policeman; and (b) may be taken to the place in which he is required in accordance with law to be detained. (2) Section 301(4) (cases where persons temporarily released from service detention are unlawfully at large) applies for the purposes of this section. (3) A person may use reasonable force, if necessary, in the exercise of a power conferred by subsection (1).