The Parliament of India is the supreme legislative body of the Republic of India. Parliament is composed of the President of India, the Rajya Sabha (Council of States) and the Lok Sabha (House of the People). The President in his role as head of legislature has full powers to summon and prorogue either house of Parliament or to dissolve Lok Sabha. However, in keeping with the Westminster system of government, the president can exercise these powers only upon the advice of the Prime Minister and his Council of Ministers.