law: 3. Power to create, alter or abolish districts, sub-divisions, etc.-
  (1) The Administrator may, with the previous concurrence of the Government, by notification in the Official Gazette, divide the Union territory of Tripura into one or more districts, and may similarly divide any district into sub-divisions, circles and tehsils, and may alter the limits of, or abolish, any district, sub-division, circle or tehsil.
  (2) The districts, sub-divisions, circles and tehsils existing at the commencement of this Act shall continue respectively to be the districts, sub-divisions, circles and tehsils under this Act unless otherwise provided under sub-section (1).