The Delimitation Commission is a constitutional body responsible for the delimitation (redrawing) of parliamentary and assembly constituencies in India. It is an independent body that is constituted by the President of India and consists of a Chief Election Commissioner, or an Election Commissioner nominated by the Chief Election Commissioner, and the State Election Commissioner of the concerned state.

The delimitation process is carried out to ensure fair representation of the people through equal distribution of constituencies based on population. It aims to maintain a balance between the number of voters in each constituency and to prevent malapportionment, which is the uneven distribution of voters among constituencies.

The Delimitation Commission is responsible for delimiting constituencies in states, autonomous regions, and nominated seats in the Parliament. However, it does not have the authority to delimit constituencies in Union Territories.

Union Territories in India are directly governed by the President through the Lieutenant Governor or Administrator appointed by the President. Unlike states, Union Territories do not have their own Legislative Assemblies and are represented in the Parliament by Members of Parliament (MPs) who are elected directly. The number of MPs representing Union Territories is determined by the President.

Since Union Territories do not have their own Legislative Assemblies, there is no need for delimitation of constituencies in these regions. The number of MPs representing Union Territories is fixed and does not change based on population. Therefore, the Delimitation Commission does not have the responsibility to delimit constituencies in Union Territories.

Overall, the Delimitation Commission plays a crucial role in ensuring fair representation of the people in parliamentary and assembly constituencies. However, its responsibility does not extend to delimiting constituencies in Union Territories.