Legislative branch: description: unicameral National Assembly or Parliament (Bunge) (393 seats; 264 members directly elected in single-seat constituencies by simple majority vote, 113 women indirectly elected by proportional representation vote, 5 indirectly elected by simple majority vote by the Zanzibar House of Representatives, 10 appointed by the president, and 1 seat reserved for the attorney general; members serve a 5-year term); note - in addition to enacting laws that apply to the entire United Republic of Tanzania, the National Assembly enacts laws that apply only to the mainland; Zanzibar has its own House of Representatives or Baraza La Wawakilishi (82 seats; 50 members directly elected in single-seat constituencies by simple majority vote, 20 women directly elected by proportional representation vote, 10 appointed by the Zanzibar president, 1 seat for the House speaker, and 1 ex-officio seat for the attorney general; elected members serve a 5-year term)
elections: Tanzania National Assembly and Zanzibar House of Representatives - elections last held on 25 October 2015 (next National Assembly election to be held in October 2020; next Zanzibar election either October 2020 or March 2021); note the Zanzibar Electoral Commission annulled the 2015 election; repoll held on 20 March 2016
election results: National Assembly - percent of vote by party - CCM 55%, Chadema 31.8%, CUF 8.6%, other 4.6%; seats by party - CCM 253, Chadema 70, CUF 42, other 2; composition as of September 2018 - men 245, women 145, percent of women 37.2%
Zanzibar House of Representatives - percent of vote by party - NA; seats by party - NA; composition - NA
Definition: This entry has three subfields. The description subfield provides the legislative structure (unicameral – single house; bicameral – an upper and a lower house); formal name(s); number of member seats; types of constituencies or voting districts (single seat, multi-seat, nationwide); electoral voting system(s); and member term of office. The elections subfield includes the dates of the last election and next election. The election results subfield lists percent of vote by party/coalition and number of seats by party/coalition in the last election (in bicameral legislatures, upper house results are listed first). In general, parties with less than four seats and less than 4 percent of the vote are aggregated and listed as "other," and non-party-affiliated seats are listed as "independent." Also, the entries for some countries include two sets of percent of vote by party and seats by party; the former reflects results following a formal election announcement, and the latter – following a mid-term or byelection – reflects changes in a legislature’s political party composition.
Of the approximately 240 countries with legislative bodies, approximately two-thirds are unicameral, and the remainder, bicameral. The selection of legislative members is typically governed by a country's constitution and/or its electoral laws. In general, members are either directly elected by a country's eligible voters using a defined electoral system; indirectly elected or selected by its province, state, or department legislatures; or appointed by the country's executive body. Legislative members in many countries are selected both directly and indirectly, and the electoral laws of some countries reserve seats for women and various ethnic and minority groups.
Worldwide, the two predominant direct voting systems are plurality/majority and proportional representation. The most common of the several plurality/majority systems is simple majority vote, or first-past-the-post, in which the candidate receiving the most votes is elected. Countries' legislatures such as Bangladesh's Parliament, Malaysia's House of Representatives, and the United Kingdom's House of Commons use this system. Another common plurality/majority system – absolute majority or two-round – requires that candidates win at least 50 percent of the votes to be elected. If none of the candidates meets that vote threshold in the initial election, a second poll or"runoff" is held soon after for the two top vote getters, and the candidate receiving a simple vote majority is declared the winner. Examples of the two-round system are Haiti's Chamber of Deputies, Mali's National Assembly, and Uzbekistan's Legislative Chamber. Other plurality/majority voting systems, referred to as preferential voting and generally used in multi-seat constituencies, are block vote and single non-transferable vote, in which voters cast their ballots by ranking their candidate preferences from highest to lowest.
Proportional representation electoral systems – in contrast to plurality/majority systems – generally award legislative seats to political parties in approximate proportion to the number of votes each receives. For example, in a 100-member legislature, if Party A receives 50 percent of the total vote, Party B, 30 percent, and Party C, 20 percent, then Party A would be awarded 50 seats, Party B 30 seats, and Party C 20 seats. There are various forms of proportional representation and the degree of reaching proportionality varies. Some forms of proportional representation are focused solely on achieving the proportional representation of different political parties and voters cast ballots only for political parties, whereas in other forms, voters cast ballots for individual candidates within a political party.
Many countries - both unicameral and bicameral - use a mix of electoral methods, in which a portion of legislative seats are awarded using one system, such as plurality/majority, while the remaining seats are awarded by another system, such as proportional representation. Many countries with bicameral legislatures use different voting systems for the two chambers.
Source: CIA World Factbook - This page was last updated on Saturday, September 18, 2021
