The Supreme Court is the highest court in India and has ultimate judicial authority to interpret the Constitution and decide questions of national law (including local bylaws). It is also vested with the power of judicial review to ensure the application of the rule of law. Besides, as provided in the Keshavananda Bharti case (1973), though parliament has the power to alter or amend any part of the constitution, the Supreme Court has the final authority whether amendment violates or infringes upon the basic structure of the constitution.