- Article 2 of the Indian Constitution relates to the admission or establishment of new States that were not part of the Union of India previously (e.g., Sikkim). This covers adding new territories to the Union and forming new states from them. - Article 3 of the Indian Constitution deals with the internal reorganisation of the territory of India. It empowers the Parliament to form a new State by separation of territory from any State or by uniting two or more States or parts of States or by uniting any territory to a part of any State, increase/decrease the area of any State, alter the boundaries of any State, and alter the name of any State. While primarily about States, changes under Article 3 can also affect Union Territories' boundaries or names when they are involved in union with or separation from States. - A Bill under Article 3 can be introduced in either House of Parliament (Lok Sabha or Rajya Sabha), but only on the recommendation of the President. The President has to refer the Bill to the concerned State Legislature for expressing its views within a specified period. However, Parliament is not bound by these views.