The States Reorganisation Act, 1956Central Act · Act 37 of 1956
As from the appointed day, there shall be formed a new *** State to be known as the State of Punjab comprising the following territories, namely:―
(a) the territories of the existing State of Punjab; and
(b) the territories of the existing State of Patiala and East Punjab States Union; and thereupon the said territories shall cease to form part of the said existing States of Punjab and Patiala and East Punjab States Union, respectively.