Constitution of India, 1949
(1) For every State there shall be a Legislature which shall consist of the Governor, and
(a) in the States of Bihar, Madhya Pradesh, Maharashtra, Karnataka and Uttar Pradesh, two houses:
(b) in other States, one House.
(2) Where there are two Houses of the Legislature of a State, one shall be known as the Legislative Council and the other as the Legislative Assembly, and where there is only one House, it shall be known as the Legislative Assembly.