Article 9 of Constitution of India "Person voluntarily acquiring citizenship of a foreign State not to be citizens"
No person shall be a citizen of India by virtue of Article 5, or be deemed to be a citizen of India by virtue of Article 6 or Article 8, if he has voluntarily acquired the citizenship of any foreign State
Article 10 of Constitution of India "Continuance of
the rights of citizenship"
Every person who is or is deemed to be a citizen of India
under any of the foregoing provisions of this Part shall,
subject to the provisions of any law that may be made by
Parliament, continue to be such citizen.
Article 11 of Constitution of India "Parliament to regulate the right of citizenship by law"
Nothing in the foregoing provisions of this Part shall derogate from the power of Parliament to make any provision with respect to the acquisition and termination of citizenship and all other matters relating to citizenship.