s 29 Offences in relation to service custody
(1) A person subject to service law, or a civilian subject to service discipline, commits an offence if he escapes from lawful custody. (2) A person subject to service law, or a civilian subject to service discipline, commits an offence if— (a) he uses violence against a person in whose lawful custody he is, or his behaviour towards such a person is threatening; and (b) he knows or has reasonable cause to believe that the custody is lawful. (3) For the purposes of this section— (a) references to custody are to service custody; (b) a person's behaviour includes anything said by him; (c) “threatening” behaviour is not limited to behaviour that threatens violence. (4) A person guilty of an offence under this section is liable to any punishment mentioned in the Table in section 164, but any sentence of imprisonment imposed in respect of the offence must not exceed two years.