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Northern Mariana Islands Commonwealth Legislature

This article is part of a series on the
politics and government of
the Northern Mariana Islands

The Northern Mariana Islands Commonwealth Legislature is the territorial legislature of the U.S. commonwealth of the Northern Mariana Islands. The legislative branch of the territory is bicameral, consisting of a 20-member lower House of Representatives, and an upper house Senate with nine Senators. Representatives serve two-year terms and Senators serve four-year terms, both without term limits. The territorial legislature meets in the commonwealth capital of Saipan.

Similar to the United States Congress, the Senate seats are divided into three districts (three seats each) whose boundaries are identical to those of the municipalities (except that the barely inhabited Northern Islands is incorporated with Saipan). The Constitution provides for the creation of a fourth district for the Northern Islands when the population exceeds 1,000.[1] The Senate seats are divided into two classes, similar to the classes of Senators in the United States, with one class consisting of a single Senator from each district, and the second class consisting of two Senators from each district. In the first election after the ratification of the Constitution, the Senator with the third-highest number of votes held their seat for two years.[1] Requirements for Senator are a minimum age of 25, residence in the Commonwealth for five years, and a registered voter in the district represented. The Constitution permits a higher residence requirement to be legislated.

The House seats are elected from seven districts. Two districts have one seat each, one for Rota and Aguijan and the other for Tinian. The remaining five districts elect multiple members, three with two members, and two with six members, and are all located on Saipan, with one also including the Northern Islands. The Constitution provides for the Northern Islands to be a separate district when the population exceeds the number of people represented by any Representative.[1] Reapportionment occurs every 10 years following the census. Requirements for Representative are a minimum age of 21, residence in the Commonwealth for three years, and a registered voter in the district represented. As with the Senate, the Constitution permits the Legislature to enact a higher residence requirement.

The Legislature also has a youth congress, the Commonwealth of the Northern Mariana Islands Youth Congress.[2][3]


The modern legislature was created under Secretarial Order No. 2989 by federal United States in the previous year under a public plebiscite.

The Commonwealth was officially established in January 1978, and as the constitution prescribed, the first House of Representatives had 14 members (12 from Saipan). Over the years, as permitted by the constitution, House membership was increased to 20 (18 from Saipan) beginning with the 16th Legislature in 2008, the Constitutional maximum.[1]

The Northern Mariana Islands' election calendar was one of the few political divisions in the United States where general elections were held in odd-numbered years (along with Kentucky, Louisiana, Mississippi, New Jersey and Virginia). After a non-voting delegate position was created in the United States Congress for the NMI in January 2009 and its election held in November 2008, a referendum was approved in the 2009 elections changing elections to even-numbered years by delaying the 2011 elections and lengthened all political terms by one year.

 Summary of the 6 November 2012 Northern Mariana Islands Commonwealth Legislature election results
Parties Seats
House +/- Senate +/-
Republican Party 4 -5 1 +1
Covenant Party 4 -3 0 -1
Independent 12 +8 2
Democratic Party 0 -1 0
Not up for election 6
Total 20   9  
Source: Commonwealth Elections Commission

See also

External links

  • Official website


  1. ^ a b c d Constitution of the Northern Marianas Islands
  2. ^
  3. ^
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