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.

2. Admission or establishment of new States.—Parliament may by law admit into the Union, or establish, new States on such terms and conditions as it thinks fit.

Article 2 of the Constitution of India