The Army Act,1950
Section 144. Evidence of previous convictions and general character
(1) When any person subject to this Act has been convicted by a court- martial of any offence, such court- martial may inquire into, and receive and record evidence of any previous convictions of such person, either by a court- martial or by a criminal court, or any previous award of punishment under any of the sections 80, 83, 84 and 85, and may further inquire into and record the general character of such person and such other matters as may be prescribed.
(2) Evidence received under this section may be either oral, or in the shape of entries in, or certified extracts from, court- martial books or other official records; and it shall not be necessary to give notice before trial to the person tried that evidence as to his previous convictions or character will be received.
(3) At a summary court- martial the officer holding the trial may, if he thinks fit, record any previous convictions against the offender, his general character, and such other matters as may be prescribed, as of his own knowledge, instead of requiring them to be proved under the foregoing provisions of this section.