4.2. Termination of Citizenship (Section 9)

Any citizen of India who voluntarily acquires, or has at any time between the 26th January 1950 and the commencement of this Act voluntarily acquired, the citizenship of another country, cease to be a citizen of India. However, this provision does not apply during any war in which India may be engaged.

If any question arises as to whether, when or how any person has acquired the citizenship of another country, it shall be determined by such authority, in such manner, and having regard to such rules of evidence, as may be prescribed in this behalf. The acquisition of another country's passport is also deemed under the Citizenship Rules, 1956 to be voluntary acquisition of another country’s nationality.