s 322 Commencement of sentence of imprisonment on prisoner already undergoing imprisonment
322.—(1) Where a person who is an escaped convict or is undergoing a sentence of imprisonment is sentenced again to imprisonment, the latter sentence of imprisonment must begin either immediately or at the end of the imprisonment to which the person was previously sentenced, as the court awarding the sentence directs. (2) A death sentence must be carried out despite a pending sentence of imprisonment. (3) Nothing in subsection (1) may be held to excuse a person from any part of the punishment to which the person is liable upon the person’s former or subsequent conviction.