Part 1 of the Indian Constitution is titled The Union and its Territory and it contains four articles: Article 1 to Article 4. These articles are important because they define the structure and boundaries of India as a country and a union of states. They also empower the Parliament to create or modify the states or union territories as per the changing needs and aspirations of the people. For example, these articles were invoked when West Bengal was renamed, and for formation of relatively new states such as Jharkhand, Chhattisgarh, Sikkim and Telangana.
THE UNION AND ITS TERRITORY ARTICLES(1-4)
Name and territory of the Union.
Admission or establishment of new States. [2A. Sikkim to be associated with the Union.—Omitted.]
Formation of new States and alteration of areas, boundaries or names of existing States.
Laws made under articles 2 and 3 to provide for the amendment of the First and the Fourth Schedules and supplemental, incidental and consequential matters.