Section 15(a) in The States Reorganisation Act, 1956
(a)the Northern Zone, comprising the States of [Haryana, [Punjab, Himachal Pradesh] [Substituted by Act 31 of 1966, Section 86, for "Punjab". ], Rajasthan and Jammu and Kashmir and the [Union territories] [Substituted by the Adaptation of Laws (No. 1) Order, 1956, for "Part C States"] of Delhi, [and Chandigarh] [Substituted by Act 53 of 1970, Section 47, for "Himachal Pradesh and Chandigarh" (w.e.f. 25-1-1971)]];
