Section 55(b) in The Central Reserve Police Force Rules, 1955
(b)For exceptional reasons, the Commandant may promote an unqualified Head Constable to the rank of Sub-Inspector or an unqualified Sub-Inspector to the rank of Subedar (Inspector) with the prior approval of the Deputy Inspector-General or Inspector-General respectively, provided that such promotions in either case do not exceed ten per cent. of the sanctioned strength in such ranks.
