In which year did the Indian Parliament pass the Citizenship Act?

In 1955 the Citizenship Act was passed in India. The conferment of a person, as a citizen of India, is governed by Articles 5 to 11 (Part II) of the Indian Constitution. Article 11 of the Constitution confers power on the parliament to make laws regarding citizenship. Citizen means a person who under the citizenship or nationality law for the time being in force in that country, is a citizen or national of that country. Indian citizenship can be acquired: birth, descent, registration, and naturalization. The provisions are listed under the Citizenship Act, 1955.