law: Representation of the People Act, 1950 
  7. Total number of seats in Legislative Assemblies and assembly
  
  constituencies
  
  (1) 16[Subject
  
  to the provisions of 17[sub-sections (1A) and (1B)]] the total
  
  number of seats in the Legislative Assembly of each State specified in the
  
  Second Schedule, to be filled by persons chosen by direct election from
  
  assembly constituencies, and the number of seats, if any, to be reserved for
  
  the Scheduled Castes and for the Scheduled Tribes of the State, shall be as
  
  shown in that Schedule:
  Provided that for the period
  
  referred to in clause (2) of article 371A, 16[subject to the
  
  provisions of 17[sub-sections (1A) and (1B)]] the total number of
  
  seats allotted to the Legislative Assembly of the State of Nagaland 
  
  shall be 18[fifty-two], of which–
  (a) 19[twelve
  
  seats] shall be allocated to the Tuensang district
  
  and shall be filled by persons chosen by the members of the regional council,
  
  referred to in that article, from amongst themselves in such manner as the
  
  Governor, after consulting that council may, by notification in the Official
  
  Gazette, specify, and
  (b) the remaining forty
  
  seats shall be filled by persons chosen by direct election from assembly
  
  constituencies in the rest of the State.
   20  [(1A) Notwithstanding
  
  anything contained in sub-section (1), the total number of seats in the
  
  Legislative Assembly of the State of Sikkim , to be
  
  constituted at any time after the commencement of the Representation of the
  
  People (Amendment) Act, 1980, to be filled by persons chosen by direct election
  
  from assembly constituencies shall be thirty-two, of which-
  (a) twelve seats shall
  
  be reserved for Sikkimese of Bhutia-Lepcha 
  
  origin;
  (b) two seats shall be
  
  reserved for the Scheduled Castes of that State; and
  (c) one seat shall be reserved for the  Sanghas referred to in section 25A.
  Explanation- In this sub-section
  
  " Bhutia " includes Chumbipa ,
  
   Dopthapa , Dukpa ,  Kagatey , Sherpa ,  Tribetan , Tromopa and  Yolma .]
   21  [(1B) Notwithstanding
  
  anything contained in sub-section (1), in the Legislative Assemblies of the
  
  States of Arunachal Pradesh, Meghalaya ,
  
   Mizoram and Nagaland , to be
  
  constituted at any time after the commencement of the Representation of the
  
  People (Third Amendment) Act, 1987,-
  (a) thirty-nine seats shall be reserved for
  
  the Scheduled Tribes in the Legislative Assembly of the State of  Arunachal Pradesh;
  (b) fifty-five seats shall be reserved for the
  
  Scheduled Tribes in the Legislative Assembly of the State of  Meghalaya ;
  (c) thirty-nine seats shall be reserved for
  
  the Schedules Tribes in the Legislative Assembly of the State of  Mizoram ; and
  (d) fifty-nine seats shall be reserved for the
  
  Scheduled Tribes in the Legislative Assembly of the State of  Nagaland .]
  (2) Every assembly
  
  constituency referred to in 22[sub-section (1) or sub-section (1A)]
  
  shall be a single-member constituency.
   23  [(3) 24[The
  
  extent of each assembly constituency in all the States and Union territories
  
  except the assembly constituencies in the State of Sikkim 
  
  and] in the Union territory of Arunachal Pradesh
  
  shall be as determined by the orders of the Delimitation Commission made under
  
  the provisions of the Delimitation Act, 1972 (76 of 1972) 25[the
  
  extent of each assembly constituency in the State of Sikkim 
  
  shall be as provided for in the Delimitation of Parliamentary and Assembly
  
  Constituencies Order, 1976, as amended by section 4 of the Representation of
  
  the People (Amendment) Act, 1980] and the extent of each assembly
  
  constituencies in the Union territory of Arunachal 
  
  Pradesh shall be as determined by the order of the Election Commission made
  
  under the provisions of the Government of Union Territories Act, 1963 (20 of
  
  1963).]