THAILAND

ELECTORAL SYSTEM
 
Chamber:
  Saphaphuthan Ratsadon
 
Electoral Law:
  1 January 1900
  16.10.2007
 
Constituencies:
  Majority system (400 seats):
- 153 multi-member constituencies (from two to three seats each)
- 4 single member constituencies
*The number of representatives per changwat (province) is calculated on the basis of the ratio of the changwat's population to the national population (1 member for every 157,071 inhabitants in the 2007 elections).
Proportional representation system (80 seats):
- 8 constituencies (10 seats each) using clusters of provinces
 
Voting System:
  Mixed system:
Majority system for the constituency-based voting (for 400 seats)
Each voter casts as many votes as there are members to be elected from each constituency. The candidate/s with the most votes is/are elected.
Representatives elected from a constituency and appointed to ministerial posts must vacate their seats within 30 days of their appointment. They or the party they represent are in charge of the by election in that constituency.

Proportional representation (closed party-list system for 80 seats)
Voters are allowed to vote for only one party list. The party lists are submitted to the Election Commission before the deadline for submission of candidacies to the constituency based elections. The total valid votes won are divided by 10 to determine the number of votes needed for each candidate to be elected (quotient). The number of party list representatives that each party may appoint is calculated by dividing the total valid votes that each party obtained by the quotient. If fewer than 10 representatives are elected by this method, the parties having the most remaining votes share the remaining seats.
Party-list representatives who are appointed to ministerial posts must vacate their seats within 30 days of their appointment, and the next name on the relevant party list is appointed as a representative without a by election.
Voting is compulsory.
 
Voter requirements:
  - age: at least 18 years old
- Thai citizenship by birth
Disqualifications: insanity, mental infirmity, Buddhist priests, monks or clergy, detention by a court-issued warrant or legal order, deprivation of the right to vote by court decision.
 
Eligibility:
  - qualified voters
- age: at least 25 years old on election day
- Thai nationality by birth
- members of any and only one political party for a consecutive period of not less than ninety days prior to the submission of candidacy (thirty days of membership suffice if the general election is called on account of early dissolution of the House of Representatives)
- persons satisfying one of the following conditions:
(a) residence in the changwat for at least five consecutive years prior to the candidacy application
(b) persons born in the changwat where they are standing for election
(c) persons having studied in an educational institution situated in the changwat where they are standing for election for a consecutive period of not less than five academic years
(d) persons having served in the official service of the changwat where they are standing for election for at least five consecutive years prior to the submission of their candidacy

Ineligibilities:
- government officials holding a permanent position or receiving a salary, except political officials
- members of a local assembly or a local administrator
- senators and former senators who have been out of office for less than two years
- officials or employees of a government agency, State agency or State enterprise or other State officials
- judges of the Constitutional Court, Election Commissioners, Ombudsmen, members of the State Audit Commission or members of the National Human Rights Commission
- undischarged bankrupts, persons addicted to harmful drugs, detained persons under sentence or order of imprisonment, imprisonment of two years or more (except for an offence committed through negligence) discharged less than five years before the election day concerned, deaf and dumb persons
 
Incompatibilities:
  - national or local government officials (excluding political officials) holding a permanent salaried position
- officials in the employ of a State agency or enterprise
- membership of a local assembly
- persons receiving a concession or benefit from a government agency
government contractors
- government contractors
 
Candidacy requirements:
  - nomination by a political party
- payment of a deposit of 10,000 baht per candidate


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