Examine the specific legal terminologies utilized within Article 1 to define the geopolitical boundaries of the nation:
1. The constitutional expression 'Union of India' is a restrictive term that encompasses only the constituent regional states.
2. The expression 'Territory of India' represents a broader geographical definition encompassing states, Union Territories, and future acquisitions.
3. Regions designated as 'acquired territories' are granted immediate federal autonomy independent of Central government administration.