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Redistribution (re-districting in the United States and in the Philippines) is the process by which electoral districts are added, removed, or otherwise changed. Redistribution is a form of boundary delimitation that changes electoral district boundaries, usually in response to periodic census results. [1] Redistribution is required by law or constitution at least every decade in most representative democracy systems that use first-past-the-post or similar electoral systems to prevent geographic malapportionment.[ citation needed ] The act of manipulation of electoral districts to favour a candidate or party is called gerrymandering.
In Australia, redistributions are carried out by independent and non-partisan commissioners in the Commonwealth, and in each state or territory. The various electoral acts require the population of each seat to be equal, within certain strictly limited variations. The longest period between two redistributions can be no greater than seven years. Many other triggers can force redistribution before the chronological limit is reached. The redistribution is drafted by civil servants.
In Canada, the Constitution mandates that redistribution in the federal House of Commons occur "on the completion of each decennial census." [2] The number of seats amongst the ten provinces is set by several related constitutional provisions. District boundaries within provinces are based on electoral quotients for that province. Independent boundary commissions issue reports with new district boundaries for each province.
Once the reports are produced, they are then submitted to Parliament, MPs may offer objections to the boundaries, but the boundary commissions are not compelled to make any changes as a result of the objections. [3]
Similar processes are followed in each province, under provincial law.
India has an established process to redistribute its legislative districts. Redistributions are approved by political appointees to the Boundary Commission of India.
The Constitution of Ireland states that general elections to the Dáil (lower house) must use the single transferable vote (STV), that each Dáil constituency must return at least three members (TDs), that boundaries must be revised at least every twelve years, and that the ratio of TDs to inhabitants (not voters or citizens) be between 20,000 and 30,000 on average and "so far as it is practicable" equal between constituencies. [4] Electoral Acts are passed by the Oireachtas to revise boundaries in light of the most recent census. [5] In constituencies for the next general election, the 2016 population per TD averages 29,762, varying from 28,199 in Dublin North-West to 31,270 in Dún Laoghaire. [6] Since 1977, an independent body (since 1997 a permanent Constituency Commission) recommends boundaries, which the Oireachtas usually accepts. [5] The terms of reference of the Commission have set five seats as the maximum and discourage constituencies crossing county boundaries. [n 1] [5] A separate Local Electoral Area Boundary Committee fulfils a similar function for local electoral area boundaries. A proposed Electoral Commission would replace both the Constituency Commission and the Local Electoral Area Boundary Committee. [7]
Before 1977, boundary drawing was often partisan in favour of the government of the day. The Electoral (Amendment) Act 1959 was struck out in 1961 by the Supreme Court as being repugnant to the Constitution because of excessive malapportionment. [5] The replacement Electoral (Amendment) Act 1961 relied on manipulating district size [n 2] The Supreme Court allowed the 1961 Act, ruling that the Oireachtas had wide latitude to decide what degree of divergence was "practicable" and what factors could be considered, but reserved the right to judicial review of proposed boundaries. [5] [10] A 1968 proposal rejected by referendum would have specified one-sixth as the maximum constituency divergence from the average population per TD. Another proposal, rejected simultaneously, would have established a constituency commission (ancillary to replacing STV with first-past-the-post voting). The Electoral (Amendment) Act 1974 attempted a manipulation similar to the 1961 act, but backfired when a larger than expected swing created a tipping point favouring the opposition in 1977. There was a lacuna after the publication of the 2016 census results in which the Electoral (Amendment) (Dáil Constituencies) Act 2013 was in force but its 158 seats breached the 30,000 population average; jurists wondered whether the courts would have permitted a general election in the interim before the Electoral (Amendment) (Dáil Constituencies) Act 2017 resolved the issue. [11]
Japan does not have an established process to redistribute its legislative districts. The frequency of redistributions is irregular and not triggered a particular event. Redistributions are approved by the national legislature.[ citation needed ]
In Kazakhstan, the redistribution of legislative districts is conducted by the Central Election Commission (CEC) as accordance with Articles 12 and 22 of the Constitutional Law "On Elections". [12] Under the guidelines of the CEC, the redistribution cycle for legislative elections takes place at least six months prior to the expiration of the term of elected deputies. [13]
In Mexico, an independent administrative body, called the Instituto Nacional Electoral, redraws congressional districts according to an objective scoring function and optimization algorithm. Although political parties can propose maps, the process is largely influenced by redistricting algorithms.[ citation needed ]
New Zealand has a fixed process to determine how its legislative districts are redistributed. Redistribution in New Zealand happens every five years following the census. [14]
In the Philippines, redistricting is carried out by Congress after every quinquennial census is published. However, Congress has never passed a general redistricting act, and instead redistricts provinces or cities piecemeal, or creates new provinces or cities with legislative districts. The last general redistricting law was via the ordinance in the 1987 constitution, which was based from the 1980 census. The creation of a new province or city needs the approval of the public via a plebiscite, while piecemeal redistricting does not need a plebiscite.[ citation needed ]
In the United Kingdom, there are four Boundary Commissions (one each for England, Scotland, Wales, and Northern Ireland) responsible for reviewing the boundaries of Parliamentary constituencies. These are established by Parliament as arms-length bodies that operate outside of direct ministerial control. They are chaired by the Speaker of the House of Commons, however by convention they do not participate in the work of the commission. The deputy chair, who must be a serving High Court judge, therefore leads the commission with support from two other independent commissioners whose appointments are made following an open public appointments selection process. [15]
In the United States, redistribution occurs after each decennial census. Most states' legislative district redistributions are approved by the state legislature. Supreme Court rulings (such as the one man, one vote principle) require that legislative districts have roughly equal populations.
There are 39 multi-member electoral districts, known as Dáil constituencies, that elect 160 TDs, to Dáil Éireann, the house of representatives of the Oireachtas, Ireland's parliament, on the system of proportional representation by means of the single transferable vote (PR-STV), to a maximum term of five years. The configuration of constituencies and seats per constituencies has been reviewed, and is subject to Oireachtas approval.
Louth is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 5 deputies on the system of proportional representation by means of the single transferable vote (PR-STV).
Galway East is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 3 deputies on the system of proportional representation by means of the single transferable vote (PR-STV).
Kildare North is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 4 deputies on the electoral system of proportional representation by means of the single transferable vote (PR-STV).
Kildare South is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 4 deputies on the electoral system of proportional representation by means of the single transferable vote (PR-STV).
Limerick East was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas from 1948 to 2011. The method of election was proportional representation by means of the single transferable vote (PR-STV).
Dublin North was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas, from 1981 to 2016, representing an area in the north of County Dublin. A previous constituency of the same existed in Dublin City from 1923 to 1937. The method of election was proportional representation by means of the single transferable vote (PR-STV).
Dublin South-Central is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 4 deputies on the system of proportional representation by means of the single transferable vote (PR-STV).
Dublin South-West is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 5 deputies on the system of proportional representation by means of the single transferable vote (PR-STV).
The Electoral (Amendment) Act 2005 is a law of Ireland which revised Dáil constituencies in light of the 2002 census. The new constituencies took effect on the dissolution of the 29th Dáil on 29 April 2007 and a general election for the 30th Dáil on the revised constituencies took place on 24 May 2007.
The Electoral (Amendment) Act 1998 was a law of Ireland which revised Dáil constituencies in light of the 1996 census. It took effect on the dissolution of the 28th Dáil on 25 April 2002 and a general election for the 29th Dáil on the revised constituencies took place on 17 May 2002.
The Electoral (Amendment) Act 1995 was a law of Ireland which revised Dáil constituencies in light of the 1991 census. It took effect on the dissolution of the 27th Dáil on 15 May 1997 and a general election for the 28th Dáil on the revised constituencies took place on 6 June 1997.
Dublin County Mid was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas from 1977 to 1981. The constituency elected 3 deputies to the Dáil, using proportional representation by means of the single transferable vote (PR-STV).
The Third Amendment of the Constitution Bill 1968 was a bill to amend the Constitution of Ireland to change the criteria for redistribution of constituencies for elections to Dáil Éireann, the lower house of the Oireachtas. The proposal was rejected in a referendum held on 16 October 1968.
The Constituency Commission is an independent commission in Ireland which had advised on redrawing of constituency boundaries of Dáil constituencies for the election of members to Dáil Éireann and European Parliament constituencies prior to the establishment of the Electoral Commission in 2023. Each commission was established by the Minister for Housing, Planning and Local Government after the census. The Commission then submitted a non-binding report to the Oireachtas, and was dissolved. A separate but similar Local Electoral Area Boundary Committee fulfilled the same function for local electoral area boundaries of local government areas.
The Electoral (Amendment) Act 2009 is a law of Ireland which amended electoral law, including revisions to Dáil constituencies and European Parliament constituencies in light of the 2006 census. The new European Parliament constituencies were used at the election in June 2009. The revision to Dáil constituencies took effect on the dissolution of the 30th Dáil on 1 February 2011 and a general election for the 31st Dáil on the revised constituencies took place on 25 February 2011.
Laois was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas, from 2016 to 2020. The constituency elected 3 deputies. The method of election was proportional representation by means of the single transferable vote (PR-STV).
The Electoral (Amendment) Act 2013 is a law of Ireland which revised Dáil constituencies in light of the 2011 census and a requirement to reduce the number of Dáil seats. The new constituencies took effect on the dissolution of the 31st Dáil on 3 February 2016 and a general election for the 32nd Dáil on the revised constituencies took place on 26 February 2016.
The Electoral (Amendment) Act 2017 is a law of Ireland which revised Dáil constituencies. It took effect on the dissolution of the 32nd Dáil on 14 January 2020 and a general election for the 33rd Dáil on the revised constituencies took place on 8 February 2020.
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