Section 11(4)(c) in The Central Reserve Police Force Rules, 1955
(c)The minimum standard laid down in sub-rule (a) in so far as it relates to height may be relaxed from 5'-7" to 5'-4" in case of [persons] [Substituted by G.S.R. 233, dated 4.5.1998 (w.e.f. 18.4.1998). ] who have attained the age of eighteen years but have not attained twenty years;