Section 9 in THE CONSTITUTION (SEVENTH AMENDMENT) ACT, 1956
9. Substitution of new article for Article 170.-
For Article 170 of the Constitution, the following article shall be substituted, namely:-"170. Composition of the Legislative Assemblies.-(1) Subject to the provisions of Article 333, the Legislative Assembly of each State shall consist of not more than five hundred, and not less than sixty, members chosen by direct election from territorial constituencies in the State.(2)For the purposes of clause (1), each State shall be divided into territorial constituencies in such manner that the ratio between the population of each constituency and the number of seats allotted to it shall, so far as practicable, be the same throughout the State.Explanation.-In this clause, the expression "population" means the population as ascertained at the last preceding census of which the relevant figures have been published.(3)Upon the completion of each census, the total number of seats in the Legislative Assembly of each State and the division of each State into territorial constituencies shall be readjusted by such authority and in such manner as Parliament may by law determine:Provided that such readjustment shall not affect representation in the Legislative Assembly until the dissolution of the then existing Assembly.".
