The Constitution of India, 1950
Every High Court, passing or making a judgment, decree, final order, or sentence, referred to in clause (1) of article 132 or clause (1) of article 133, or clause (1) of article 134,— (a) may, if it deems fit so to do, on its own motion; and (b) shall, if an oral application is made, by or on behalf of the party aggrieved, immediately after the passing or making of such judgment, decree, final order or sentence, determine, as soon as may be after such passing or making, the question whether a certificate of the nature referred to in clause (1) of article 132, or clause (1) of article 133 or, as the case may be, sub-clause (c) of clause (1) of article 134, may be given in respect of that case.