Explanation: During the British Rule, certain areas were constituted as ‘scheduled districts’ in 1874. Later, they came to be known as ‘chief commissioners provinces.

• After independence, they were placed in the category of Part ‘C’ States and Part ‘D’ Territories.
• In 1956, they were constituted as the ‘union territories’ by the 7^th Constitutional Amendment Act (1956) and the States Reorganisation Act (1956).

Source: Laxmikanth