Speaker

The constitution stipulates that the assembly is presided over by a Speaker and two Deputy Speakers,^[2] who are responsible for expediting the legislative process. The Speaker and Deputy Speakers are elected in a secret ballot by the members of the Assembly, and their term in office is restricted to two years.^[3] The Speaker is independent of party affiliation, and the Speaker and Deputy Speakers may not simultaneously be government ministers.^[3]

Negotiation groups

Parties that hold at least 20 seats in the assembly form floor negotiation groups (Korean: 교섭단체, Hanja: 交涉團體, RR: gyoseop danche), which are entitled to a variety of rights that are denied to smaller parties. These include a greater amount of state funding and participation in the leaders' summits that determine the assembly's legislative agenda.^[4]

In order to meet the quorum, the United Liberal Democrats, who then held 17 seats, arranged to "rent" three legislators from the Millennium Democratic Party. The legislators returned to the MDP after the collapse of the ULD-MDP coalition in September 2001.^[5]

Legislative process

This graph traces the recent origins of all six main political parties currently in the Republic of Korea. All of which have either split from or merged with other parties in the last four years. They have emerged from four main ideological camps, from Left to Right: Progressive (socialist), liberal, centrist, and conservative.

To introduce a bill, a legislator must present the initiative to the Speaker with the signatures of at least ten other members of the assembly. The bill must then be edited by a committee to ensure that the bill contains correct and systematic language. It can then be approved or rejected by the Assembly.^[6]

Committees

There are 17 standing committees which examine bills and petitions falling under their respective jurisdictions, and perform other duties as prescribed by relevant laws.^[7]

• House Steering Committee
• Legislation and Judiciary Committee
• National Policy Committee
• Strategy and Finance Committee
• Education Committee
• Science, ICT, Broadcasting and Communications Committee
• Foreign Affairs and Unification Committee
• National Defense Committee
• Public Administration and Security Committee
• Culture, Sports and Tourism Committee
• Agriculture, Food, Rural Affairs, Oceans and Fisheries Committee
• Trade, Industry, Energy, SMEs and Startups Committee
• Health and Welfare Committee
• Environment and Labor Committee
• Land Infrastructure and Transport Committee
• Intelligence Committee
• Gender Equality and Family Committee

Election

Allocation of seats within the electoral system. Red and green: parallel voting; 253 FPTP seats and 17 PR seats. Blue: additional member system for 30 seats

The National Assembly has 300 seats, with 253 constituency seats under FPTP and 47 proportional representation seats. With electoral reform taken in 2019, the PR seats apportionment method was replaced by a variation of additional member system from previous parallel voting system, although 17 seats were temporarily assigned under parallel voting in the 2020 South Korean legislative election.^[8]

Per Article 189 of Public Official Election Act,^[9][10] the PR seats are awarded to parties that have either obtained at least 3% of the total valid votes in the legislative election or at least five constituency seats. The number of seats allocated to each eligible party are decided by the formula:

$${\displaystyle n_{\text{initial}}=\left\lfloor {\frac {(n_{\text{Assembly}}-n_{\text{ineligibles}})\times {\text{PR votes ratio}}-n_{\text{obtained constituencies}}+1}{2}}\right\rfloor }$$

where

• n_Assembly = total number of seats in the National Assembly.
• n_ineligibles = number of seats obtained by ineligible parties and independents.
• n_{obtained constituencies} = number of constituency seats obtained by the party.
• n_ams = total number of seats allocated for additional member system.

If the integer is less than 1, then n_initial is set to 0 and the party does not get any seats. Then the sum of initially allocated seats are compared to total seats for additional member system, and recalculated.

$${\displaystyle n_{\text{remainder}}=\left(n_{\text{ams}}-\sum n_{\text{initial}}\right)\times {\text{PR votes ratio}}}$$

$${\displaystyle n_{\text{final}}={\begin{cases}n_{\text{initial}}+n_{\text{remainder}},&{\text{if }}\sum n_{\text{initial}}<n_{\text{ams}}\\n_{\text{ams}}\times {\dfrac {n_{\text{initial}}}{\sum n_{\text{initial}}}},&{\text{if }}\sum n_{\text{initial}}>n_{\text{ams}}\end{cases}}}$$

Final seats are assigned through the largest remainder method, and if the remainder is equal, the winner is determined by lottery among the relevant political parties.

The voting age was also lowered from 19 to 18 years old, expanding the electorate by over half a million voters.^[11]

First Republic

Elections for the assembly were held under UN supervision^[18] on 10 May 1948. The First Republic of Korea was established on 17 July 1948^[19] when the constitution of the First Republic was established by the Assembly. The Assembly also had the job of electing the president and elected anti-communist Syngman Rhee as president on 10 May 1948.

Under the first constitution, the National Assembly was unicameral. Under the second and third constitutions, the National Assembly was to be bicameral and consist of the House of Representatives and the House of Councillors, but in practice the legislature was unicameral because the House of Representatives was prevented from passing the law necessary to establish the House of Councillors.

  Conservative   Liberal   Progressive

  majority   plurality only   largest minority

Second Republic

Third Republic

Since the reopening of the National Assembly in 1963 until today, it has been unicameral.

Fourth Republic

Fifth Republic

Sixth Republic

  majority   plurality   largest minority