 A detainee may also be granted leave subject to such conditions and restrictions as the Minister thinks fit.Any detainee who has been permitted to engage in employment or is granted leave who remains at large without lawful excuse or fails to return to his place of detention after the direction or leave has been revoked is deemed to be unlawfully at large and to have escaped from lawful custody.As detention under the CLTPA does not put a detainee in jeopardy of possible trial and punishment for an alleged offence, the detention is, in this narrow sense, not a criminal cause or matter.