(3) As soon as may be after the commencement of 1[ the Legislative Councils Act, 1957 (37 of 1957 )], the President, after consultation with the Election Commission, shall by order determine--
(a) the constituencies into which the said new State shall be divided for the purpose of elections to the Council under each of the sub- clauses (a), (b) and (c) of clause (3) of article 171;
(b) the extent of each constituency; and
(c) the number of seats allotted to each constituency.