The Union Council of Ministers exercises executive authority in the Republic of India. It consists of senior ministers, called "Cabinet Ministers", and junior ministers, called "Ministers of State". It is led by the Prime Minister. A smaller executive body, called the Union Cabinet is the supreme decision-making body in India. Only the Prime Minister and ministers of the rank of "Cabinet Minister" are members of the Cabinet. The most senior civil servant in India, called the Cabinet Secretary, leads the Cabinet Secretariat, and provides administrative assistance to the Council of Ministers. Ministers of State are tasked with assisting Cabinet Ministers in their work.