Indian ConstitutionLawPart 1 - The Union and its Territory
Article 1 Of Indian Constitution

Article 1: Name and territory of the Union
(1) India, that is Bharat, shall be a Union of States.
(2) The States and the territories thereof shall be as specified in the First Schedule.
(3) The territory of India shall comprise —
(a) the territories of the States;
(b) the Union territories specified in the First Schedule; and
(c) such other territories as may be acquired.