(1) Where an offence under this Act had been committed by any person while subject to this Act and he had ceased to be so subject, he may be taken into and kept in Force custody and tried and punished for such offence as if he continued to be so subject.
     (2) No such person shall be tried for an offence, unless his trial commences within a period of three years after he had ceased to be subject to this Act; and in computing such period, the time during which such person has avoided arrest by absconding or concealing himself or where the institution of the proceeding in respect of the offence has been stayed by an injunction or order, the period of the continuance of the injunction or order, the day on which it was issued or made, and the day on which it was withdrawn, shall be excluded:
     Provided that nothing contained in this sub-section shall apply to the trial of any such person for an offence of desertion or for any of the offences mentioned in section 24 or shall affect the jurisdiction of a criminal court to try an offence triable by such court as well as by an Assam Rifles Court.