(1)When any person subject to this Act has been convicted by an Assam Rifles Court of any offence, such Assam Rifles Court may inquire into, and receive, and record evidence of any previous convictions of such person, either by an Assam Rifles Court or by a criminal court, or any previous award of punishment under section 62 or section 64 or section 65 or section 66, and may further inquire into and record the general character of such person and such other matters as may be prescribed.