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A bicameral legislature divides the legislators into two separate assemblies, chambers, or houses. Bicameralism
Bicameralism
is distinguished from unicameralism, in which all members deliberate and vote as a single group, and from some legislatures that have three or more separate assemblies, chambers, or houses. As of 2015, fewer than half the world's national legislatures are bicameral.[1] Often, the members of the two chambers are elected or selected by different methods, which vary from country to country. This can often lead to the two chambers having very different compositions of members. Enactment of primary legislation often requires a concurrent majority – the approval of a majority of members in each of the chambers of the legislature. When this is the case, the legislature may be called an example of perfect bicameralism. However, in many Westminster system parliaments, the house to which the executive is responsible can overrule the other house and may be regarded as an example of imperfect bicameralism. Some legislatures lie in between these two positions, with one house only able to overrule the other under certain circumstances.

Contents

1 History of bicameral legislatures 2 Rationale for bicameralism and criticism 3 Communication between houses 4 Types

4.1 Federal

4.1.1 Canada 4.1.2 Australia 4.1.3 Others

4.2 Aristocratic and post-aristocratic 4.3 Unitary states

5 Subnational entities

5.1 Argentina 5.2 Australia 5.3 Bosnia and Herzegovina 5.4 Germany 5.5 India 5.6 Russia 5.7 United States

6 Reform

6.1 Arab political reform 6.2 Romania 6.3 Ivory Coast

7 Examples

7.1 Current 7.2 Historical

8 References 9 External links

History of bicameral legislatures[edit]

The British Parliament

The ideas that formed the basis of bicameralism trace back to theories developed in ancient Sumer, ancient India, later ancient Greece, and Rome. However, recognizable bicameral institutions first arose in Medieval Europe, associated with separate representation of different estates of the realm. For example, one house represented the aristocracy, and the other the commoners, as in the Kingdom of England.[2] Others, such as France
France
under the Ancien Régime
Ancien Régime
had a tricameral legislature known as the Estates General, which consisted of separate chambers for the clergymen, the nobility and the commoners.[3]

The United States
United States
Congress

The Founding Fathers of the United States
Founding Fathers of the United States
also favoured a bicameral legislature. The idea was to have the Senate
Senate
be wealthier and wiser. Benjamin Rush saw this though, and noted that, "this type of dominion is almost always connected with opulence." The Senate
Senate
was created to be a stabilising force, elected not by mass electors, but selected by the State legislators. Senators would be more knowledgeable and more deliberate—a sort of republican nobility—and a counter to what Madison saw as the "fickleness and passion" that could absorb the House.[2] He noted further that, "The use of the Senate
Senate
is to consist in its proceeding with more coolness, with more system and with more wisdom, than the popular branch." Madison's argument led the Framers to grant the Senate
Senate
prerogatives in foreign policy, an area where steadiness, discretion, and caution were deemed especially important".[2] State legislators chose the Senate, and senators had to possess significant property to be deemed worthy and sensible enough for the position. In 1913, the 17th Amendment passed, which mandated choosing Senators by popular vote rather than State legislatures.[2] As part of the Great Compromise, they invented a new rationale for bicameralism in which the Senate
Senate
had states represented equally, and the House had them represented by population. The British Parliament
Parliament
is often referred to as the Mother of Parliaments (in fact a misquotation of John Bright, who remarked in 1865 that "England is the Mother of Parliaments") because the British Parliament
Parliament
has been the model for most other parliamentary systems, and its Acts have created many other parliaments.[4] Many nations with parliaments have to some degree emulated the British "three-tier" model. Most countries in Europe and the Commonwealth have similarly organised parliaments with a largely ceremonial head of state who formally opens and closes parliament, a large elected lower house and a smaller, upper house.[5][6] Rationale for bicameralism and criticism[edit]

A formidable sinister interest may always obtain the complete command of a dominant assembly by some chance and for a moment, and it is therefore of great use to have a second chamber of an opposite sort, differently composed, in which that interest in all likelihood will not rule. — Walter Bagehot, The English Constitution, in Norman St John-Stevas (ed), The Collected Works of Walter Bagehot, London, The Economist, vol. 5, pp. 273-4.

There have been a number of rationales put forward in favour of bicameralism, federal states have often adopted it, and the solution remains popular when regional differences or sensitivities require more explicit representation, with the second chamber representing the constituent states. Nevertheless, the older justification for second chambers—providing opportunities for second thoughts about legislation—has survived.[citation needed] Growing awareness of the complexity of the notion of representation and the multifunctional nature of modern legislatures may be affording incipient new rationales for second chambers, though these do generally remain contested institutions in ways that first chambers are not. An example of political controversy regarding a second chamber has been the debate over the powers of the Canadian Senate
Senate
or the election of the Senate
Senate
of France.[7] The relationship between the two chambers varies; in some cases, they have equal power, while in others, one chamber is clearly superior in its powers. The first tends to be the case in federal systems and those with presidential governments. The latter tends to be the case in unitary states with parliamentary systems. There are two streams of thought: Critics believe bicameralism makes meaningful political reforms more difficult to achieve and increases the risk of gridlock—particularly in cases where both chambers have similar powers—while proponents argue the merits of the "checks and balances" provided by the bicameral model, which they believe help prevent the passage into law of ill-considered legislation. Communication between houses[edit] Formal communication between houses is by various methods, including:[8]

Sending messages Formal notices, such as of resolutions or the passing of bills, usually done in writing, via the clerk and speaker of each house Transmission of bills or amendment to bills requiring agreement from the other house Joint session a plenary session of both houses at the same time and place. Joint committees which may be formed by committees of each house agreeing to join, or by joint resolution of each house Conferences Conferences of the Houses of the English (later British) Parliament met in the Painted Chamber
Painted Chamber
of the Palace of Westminster.[9] Historically there were a distinction between an "ordinary conference" and a "free conference"; an ordinary conference in the British Parliament
Parliament
was last held in 1860 as the elaborate procedure was replaced by the simpler sending of messages. A "free conference" meets in private to resolve a dispute; it is organised by managers appointed by each house who report back to it. The last free conference at Westminster was in 1836 on an amendment to the Municipal Corporations Act 1835;[10] the previous one was in 1740.[11] In the Parliament
Parliament
of Australia
Australia
there have been two formal conferences, in 1930 and 1931, but many informal conferences.[8][12] As of 2007[update] the "Conference of Managers" remains the usual procedure for dispute resolution in the Parliament
Parliament
of South Australia.[13] In the Parliament of New South Wales
New South Wales
in 2011, the Legislative Assembly requested a free conference with the Legislative Council over a bill on graffiti; after a year the Council refused, describing the mechanism as archaic and inappropriate.[12] The United States
United States
Congress
Congress
has conference committees to resolve discrepancies between House and Senate
Senate
versions of a bill. The number of conference reports produced by such committees fell from 67 in the 104th Congress
Congress
(1995–96) to 3 in the 113th Congress
Congress
(2013–14).

Types[edit] Federal[edit] Some countries, such as Argentina, Australia, Austria, Belgium, Bosnia and Herzegovina, Brazil, Canada, Germany, India, Malaysia, Mexico, Pakistan, Russia, Switzerland, Nigeria, and the United States, link their bicameral systems to their federal political structure. In the United States, Australia, and Mexico, for example, each state is given the same number of seats in one of the houses of the legislature, despite the total population of each state — it is designed to ensure that smaller states are not overshadowed by larger states, which may have more representation in the other house of the legislature. Canada[edit]

The federal bicameral Parliament
Parliament
of Canada, which contains a House of Commons and a Senate

In Canada, the country as a whole is divided into a number of Senate Divisions, each with a different number of Senators, based on a number of factors. These Divisions are Quebec, Ontario, Western Provinces, and the Maritimes, each with 24 Senators, Yukon, Northwest Territories, Nunavut, each with 1 Senator, and Newfoundland and Labrador has 6 Senators, making for a total of 105 Senators. Senators in Canada
Canada
are not elected by the people but are appointed by the Governor
Governor
General on the advice of the Prime Minister. The Senate does not originate most legislation (although a small fraction of government bills are introduced in the Senate
Senate
and Senators may introduce private members' bills in the same way as MPs) but acts as a chamber of revision almost always passing legislation approved by the House of Commons, made up of Members of Parliament
Parliament
(MPs) who are elected. The Senate
Senate
must pass legislation before it becomes law and can therefore act as a wise facilitator or engage in filibuster. The Senate
Senate
does not have to endure the accountability and scrutiny of parliamentary elections. Therefore, the bicameral structure of Canadian parliament is more de jure than de facto.[citation needed] Australia[edit]

The federal bicameral Parliament
Parliament
of Australia, which contains a House of Representatives and a Senate

The bicameral Parliament
Parliament
of Australia
Australia
consists of two Houses, the lower house is called the House of Representatives and the upper house is named the Senate. The lower house currently consists of 150 members, each elected from single member constituencies, known as electoral divisions (commonly referred to as "electorates" or "seats") using full-preference Instant-runoff voting. This tends to lead to the chamber being dominated by two major parties, the Liberal/National Coalition and the Labor Party. The government of the day must achieve the confidence of this House to gain and hold power. The upper house, the Senate, is also popularly elected under the single transferable vote system of proportional representation. There are a total of 76 senators: 12 senators are elected from each of the six Australian states (regardless of population) and two from each of the two autonomous internal territories (the Australian Capital Territory and the Northern Territory). Unlike upper houses in most Westminster parliamentary systems, the Australian Senate
Senate
is vested with significant power, including the capacity to block legislation initiated by the government in the House of Representatives, making it a distinctive hybrid of British Westminster bicameralism and US-style bicameralism. As a result of proportional representation, the chamber features a multitude of parties vying for power. The governing party or coalition, which must maintain the confidence of the lower house, rarely has a majority in the Senate
Senate
and usually needs to negotiate with other parties and Independents to get legislation passed.[14] Others[edit] In the German, Indian, and Pakistani systems, the upper houses (the Bundesrat, the Rajya Sabha, and the Senate
Senate
respectively) are even more closely linked with the federal system, being appointed or elected directly by the governments or legislatures of each German or Indian state, or Pakistani province. This was also the case in the United States before the Seventeenth Amendment was adopted. Because of this coupling to the executive branch, German legal doctrine does not treat the Bundesrat as the second chamber of a bicameral system formally. Rather, it sees the Bundesrat and the Bundestag
Bundestag
as independent constitutional bodies. Only the directly elected Bundestag
Bundestag
is considered the parliament.[15] In the German Bundesrat, the various Länder have between three and six votes; thus, while the less populated states have a lower weight, they still have a stronger voting power than would be the case in a system based purely on population, as the most populous Land currently has about 27 times the population of the least populous. The Indian Upper House does not have the states represented equally, but on the basis of their population. There is also bicameralism in countries that are not federations, but have upper houses with representation on a territorial basis. For example, in South Africa, the National Council of Provinces
National Council of Provinces
(and before 1997, the Senate) has its members chosen by each Province's legislature. In Spain
Spain
the Senate
Senate
functions as a de facto territorial-based upper house, and there has been some pressure from the Autonomous Communities to reform it into a strictly territorial chamber. The European Union
European Union
maintains a bicameral legislative system consisting of the European Parliament, which is elected in general elections on the basis of universal suffrage, and the Council of the European Union, which consists of members of the governments of the Member States who are competent for a relevant field of legislation. The European Union
European Union
is not considered a state, but it enjoys the power to legislate in many areas, with exclusive power in some areas. Aristocratic and post-aristocratic[edit] In a few countries, bicameralism involves the juxtaposition of democratic and aristocratic elements. The best known example is the British House of Lords, which includes a number of hereditary peers. The House of Lords
House of Lords
is a vestige of the aristocratic system that once predominated in British politics, while the other house, the House of Commons, is entirely elected. Over the years, some have proposed reforms to the House of Lords, some of which have been at least partly successful. The House of Lords
House of Lords
Act 1999 limited the number of hereditary peers (as opposed to life peers, appointed by Her Majesty on the advice of the Prime Minister ) to 92, down from around 700. Of these 92, one is the Earl Marshal, a hereditary office always held by the Duke of Norfolk, one is the Lord Great Chamberlain, a hereditary office held by turns, currently by the Marquess of Cholmondeley, and the other 90 are elected by all sitting peers. Hereditary peers elected by the House to sit as representative peers sit for life; when a representative peer dies, byelections occur to fill the vacancy. The ability of the House of Lords
House of Lords
to block legislation is curtailed by the Parliament
Parliament
Acts 1911 and 1949. Peers can introduce bills except Money Bills, and all legislation must be passed by both Houses of Parliament. If not passed within two sessions, the House of Commons
House of Commons
can override the Lords delay by invoking the Parliament
Parliament
Act. Certain legislation, however, must be approved by both Houses and can't be forced through by the Commons under the Parliament
Parliament
Act. These include any bill that would extend the time length of a Parliament, private bills, bills sent to the House of Lords less than one month before the end of a session, and bills that originated in the House of Lords. Life Peers are appointed either by recommendation of the Appointment Commission; the independent body that vets non-partisan peers, typically from academia, business or culture, or by Dissolution Honour, which takes place at the end of every Parliamentary term and leaving MPs may be offered a seat to keep their institutional memory. It is traditional to offer a peerage to every outgoing Speaker of the House of Commons.[16] Further reform of the Lords has been proposed; however, reform is not supported by many. Members of the House of Lords
House of Lords
all have an aristocratic title, or are from the Clergy. 26 Archbishops and Bishops of the Church of England
Church of England
sit as Lords Spiritual, being the Archbishop of Canterbury, Archbishop of York, the Bishop of London, the Bishop of Durham, the Bishop of Winchester
Bishop of Winchester
and the next 21 longest-serving Bishops. It is usual that retiring Archbishops, and certain other Bishops, are appointed to the Crossbenches and given a life peerage. Until 2009, 12 Lords of Appeal in Ordinary sat in the House as the highest court in the land; they subsequently became justices of the newly created Supreme Court of the United Kingdom. At present, 786 people sit in the House of Lords, with 92 Hereditary, 26 being Bishops or Archbishops (the Lords Spiritual) and the rest being Life Peers. Membership is not fixed and decreases only on the death of a life peer. Another example of aristocratic bicameralism was the Japanese House of Peers, abolished after World War II
World War II
and replaced with the present House of Councillors. Unitary states[edit]

Some bicameral legislatures have chambers that meet on different buildings, at different parts of the city. Here, France's upper house called the Senate
Senate
meet in the Luxembourg Palace
Luxembourg Palace
(top), while the lower house, the National Assembly, meets at the Palais Bourbon
Palais Bourbon
(bottom).

Many bicameral countries like the Netherlands, the Philippines, the Czech Republic, the Republic of Ireland
Republic of Ireland
and Romania
Romania
are examples of bicameral systems existing in unitary states. In countries such as these, the upper house generally focuses on scrutinizing and possibly vetoing the decisions of the lower house. On the other hand, in Italy
Italy
the Parliament
Parliament
consists of two chambers that have the same role and power: the Senate
Senate
( Senate
Senate
of the Republic, commonly considered the upper house) and the Chamber of Deputies (considered the lower house). In some of these countries, the upper house is indirectly elected. Members of France's Senate, Ireland's Seanad Éireann
Seanad Éireann
are chosen by electoral colleges consisting of members of the lower house, local councillors, the Taoiseach, and graduates of selected universities, while the Netherlands' Senate
Senate
is chosen by members of provincial assemblies (which, in turn, are directly elected). Norway
Norway
had a kind of semi-bicameral legislature with two chambers, or departments, within the same elected body, the Storting. These were called the Odelsting and were abolished after the general election of 2009. According to Morten Søberg, there was a related system in the 1798 constitution of the Batavian Republic.[17] In Hong Kong, members of the unicameral Legislative Council returned from the democratically elected geographical constituencies and partially-democratic functional constituencies are required to vote separately since 1997 on motions, bills or amendments to government bills not introduced by the government. The passage of these motions, bills or amendments to government bills requires double majority in both groups simultaneously. (Before 2004, when elections to the Legislative Council from the Election Committee
Committee
was abolished, members returned through the Election Committee
Committee
vote with members returned from geographical constituencies.) The double majority requirement does not apply to motions, bills and amendments introduced by the government. Subnational entities[edit] In some countries with federal systems, individual states (like those of the United States, Australia
Australia
and a few States of India) may also have bicameral legislatures. Only three such states, Nebraska
Nebraska
in the U.S., Queensland
Queensland
in Australia
Australia
and Bavaria
Bavaria
in Germany
Germany
have later adopted unicameral systems. Brazilian states and Canadian provinces had all their upper houses abolished. Argentina[edit]

Provincial legislatures of Argentina.

In Argentina, eight provinces have bicameral legislatures, with a Senate
Senate
and a Chamber of Deputies: Buenos Aires, Catamarca, Corrientes, Entre Ríos, Mendoza, Salta, San Luis (since 1987) and Santa Fe. Tucumán and Córdoba changed to unicameral systems in 1990 and 2001 respectively. Australia[edit] In Australian states, the lower house was traditionally elected based on the one-vote-one-value principle, whereas the upper house was partially appointed and elected, with a bias towards country voters and landowners. In Queensland, the appointed upper house was abolished in 1922, while in New South Wales
New South Wales
there were similar attempts at abolition, before the upper house was reformed in the 1970s to provide for direct election. Nowadays, the upper house both federally and in most states is elected using the Single transferable vote
Single transferable vote
form of proportional representation while the lower house uses Instant-runoff voting in single member electorates. This is reversed in the state of Tasmania, where proportional representation is used for the lower house and single member electorates for the upper house. Bosnia and Herzegovina[edit] The Legislature
Legislature
of the Federation
Federation
of Bosnia and Herzegovina, one of the two entities of Bosnia and Herzegovina, is a bicameral legislative body. It consists of two chambers. The House of Representatives has 98 delegates, elected for four-year terms by proportional representation. The House of Peoples has 58 members, 17 delegates from among each of the constituent peoples of the Federation, and 7 delegates from among the other peoples.[18] Republika Srpska, the other entity, has a unicameral parliament, known as the National Assembly.[19] Germany[edit] The German federal state of Bavaria
Bavaria
had a bicameral legislature from 1946 to 1999, when the Senate
Senate
was abolished by a referendum amending the state's constitution. The other 15 states have used a unicameral system since their founding. India[edit] Seven Indian States, Andhra Pradesh, Telangana, Bihar, Jammu-Kashmir, Karnataka, Maharashtra
Maharashtra
and Uttar Pradesh, have bicameral Legislatures, these are called legislative councils (Vidhan Parishad), one third of whom are elected every two years, there are graduate constituencies (members elected exclusively by graduates), teachers constituencies (members elected exclusively by teachers), municipal constituencies (members elected exclusively by Mayors and council members of the city Governments). From 1956 to 1958 the Andhra Pradesh
Andhra Pradesh
Legislature
Legislature
was unicameral. In 1958, when the Legislative Council was formed, it became bicameral until 1 June 1985 when it was abolished. This continued until March 2007 when the Legislative Council was reestablished and elections were held for its seats. Since then the Andhra Pradesh
Andhra Pradesh
Legislature
Legislature
has become once again bicameral. In Tamil Nadu, a resolution was passed on 14 May 1986 and the Legislative Council was dissolved on 1 November 1986. Again on 12 April 2010, a resolution was passed to bring it back bicameral, but became unsuccessful in 2011. Russia[edit] Under Soviet regime
Soviet regime
regional and local Soviets were unicameral. After the adoption of 1993 Russian Constitution bicameralism was introduced in some regions. Bicameral
Bicameral
regional legislatures are still technically allowed by federal law but this clause is dormant now. The last region to switch from bicameralism to unicameralism was Sverdlovsk Oblast
Sverdlovsk Oblast
in 2012. United States[edit] During the 1930s, the Legislature
Legislature
of the State of Nebraska
Nebraska
was reduced from bicameral to unicameral with the 43 members that once comprised that state's Senate. One of the arguments used to sell the idea at the time to Nebraska
Nebraska
voters was that by adopting a unicameral system, the perceived evils of the "conference committee" process would be eliminated. A conference committee is appointed when the two chambers cannot agree on the same wording of a proposal, and consists of a small number of legislators from each chamber. This tends to place much power in the hands of only a small number of legislators. Whatever legislation, if any, the conference committee finalizes must then be approved in an unamendable "take-it-or-leave-it" manner by both chambers. During his term as Governor
Governor
of the State of Minnesota, Jesse Ventura proposed converting the Minnesotan legislature to a single chamber with proportional representation, as a reform that he felt would solve many legislative difficulties and impinge upon legislative corruption. In his book on political issues, Do I Stand Alone?, Ventura argued that bicameral legislatures for provincial and local areas were excessive and unnecessary, and discussed unicameralism as a reform that could address many legislative and budgetary problems for states. Reform[edit] Arab political reform[edit] A 2005 report[20] on democratic reform in the Arab world by the U.S. Council on Foreign Relations
Council on Foreign Relations
co-sponsored by former Secretary of State Madeleine Albright
Madeleine Albright
urged Arab states to adopt bicameralism, with upper chambers appointed on a 'specialized basis'. The Council claimed that this would protect against the 'Tyranny of the majority', expressing concerns that without a system of checks and balances extremists would use the single chamber parliaments to restrict the rights of minority groups. In 2002, Bahrain
Bahrain
adopted a bicameral system with an elected lower chamber and an appointed upper house. This led to a boycott of parliamentary elections that year by the Al Wefaq
Al Wefaq
party, who said that the government would use the upper house to veto their plans. Many secular critics of bicameralism were won around to its benefits in 2005, after many MPs in the lower house voted for the introduction of so-called morality police. Romania[edit] A referendum on introducing a unicameral Parliament
Parliament
instead of the current bicameral Parliament
Parliament
was held in Romania
Romania
on 22 November 2009. The turnout rate was 50.95%, with 77.78% of "Yes" votes for a unicameral Parliament.[21] This referendum had a consultative role, thus requiring a parliamentary initiative and another referendum to ratify the new proposed changes. Ivory Coast[edit] A referendum on a new constitution was held on 30 October 2016. The constitution draft would create a bicameral Parliament
Parliament
instead of the current unicameral. The Senate
Senate
is expected to represent the interests of territorial collectivities and Ivoirians living abroad. Two thirds of the Senate
Senate
is to be elected at the same time as the general election. The remaining one third is appointed by the president elect.[22] Examples[edit] Current[edit]

  Nations with bicameral legislatures.   Nations with unicameral legislatures.    Unicameral
Unicameral
legislature with advisory body.   No legislature.   No data.

Country Bicameral
Bicameral
body Notes

Upper house Lower house

 Afghanistan National Assembly

Masharano Jirga (House of Elders) Wolesi Jirga
Wolesi Jirga
(House of the People)

 Algeria Parliament

Council of the Nation People's National Assembly

 Antigua and Barbuda Parliament

Senate House of Representatives

 Argentina National Congress Of the twenty-three provincial legislatures, eight are bicameral, while the remaining fifteen and the legislature of the Autonomous City of Buenos Aires are unicameral.

Senate Chamber of Deputies

 Australia Parliament All of the state parliaments except Queensland's are also bicameral. The Northern Territory
Northern Territory
and the Australian Capital Territory
Australian Capital Territory
are also unicameral.

Senate House of Representatives

 Austria Parliament All of the Bundesländer have unicameral parliaments.

Bundesrat (Federal Council) Nationalrat (National Council)

 Bahamas Parliament

Senate House of Assembly

 Bahrain National Assembly

Consultative Council Council of Representatives

 Barbados Parliament

Senate House of Assembly

 Belarus National Assembly

Council House of Representatives

 Belgium Federal Parliament All of the community and regional parliaments are unicameral.

Senate Chamber of Representatives

 Belize National Assembly

Senate House of Representatives

 Bhutan Parliament

National Council National Assembly

 Bolivia Plurinational Legislative Assembly

Senate Chamber of Deputies

 Brazil National Congress All of the 26 state legislatures and the Federal District legislature are unicameral.

Senate Chamber of Deputies

 Burundi Parliament

Senate National Assembly

 Cambodia Parliament

Senate National Assembly

 Canada Parliament All of the provincial legislatures are unicameral.

Senate House of Commons
House of Commons
of Canada

 Cameroon Parliament

Senate National Assembly

 Central African Republic Parliament

Senate National Assembly

 Chile National Congress

Senate Chamber of Deputies

 Colombia Congress

Senate Chamber of Representatives

 Czech Republic Parliament

Senate Chamber of Deputies

 DR Congo Parliament

Senate National Assembly

 Congo Parliament

Senate National Assembly

 Equatorial Guinea Parliament

Senate National Assembly

 Ethiopia Federal Parliamentary Assembly Regional Councils are unicameral. Assemblyman of the Regional Councils are elected directly.

House of Federation House of Peoples' Representatives

 France Parliament
Parliament
in the Fifth French Republic

Senate National Assembly

 Gabon Parliament

Senate National Assembly

 Germany N/A In Germany, the chambers form two distinct constitutional bodies not framed by a comprehensive institution. All of the federal states (Länder) today have unicameral parliaments.

Bundesrat (Federal Council) Bundestag
Bundestag
(Federal Diet)

 Grenada Parliament

Senate House of Representatives

 Haiti Parliament

Senate Chamber of Deputies

 India Parliament Some of the states also have bicameral legislatures namely Vidhan Sabha (Legislative Assembly) and Vidhan Parishad (Legislative Council).

Rajya Sabha
Rajya Sabha
(Council of States) Lok Sabha
Lok Sabha
(House of the People)

 Indonesia People's Consultative Assembly

Regional Representative Council People's Representative Council

 Ireland Oireachtas A 2013 proposal to abolish the Seanad was defeated at referendum

Seanad Éireann
Seanad Éireann
( Senate
Senate
of Ireland) Dáil Éireann
Dáil Éireann
(Assembly of Ireland)

 Italy Parliament

Senate
Senate
of the Republic Chamber of Deputies

 Ivory Coast Parliament

Senate National Assembly

 Jamaica Parliament

Senate House of Representatives

 Japan National Diet

House of Councillors House of Representatives

 Jordan Parliament

Senate House of Representatives

 Kazakhstan Parliament

Senate Majilis
Majilis
(Assembly of People)

 Kenya Parliament

Senate National Assembly

 Lesotho Parliament

Senate National Assembly

 Liberia Legislature

Senate House of Representatives

 Madagascar Parliament

Senate National Assembly

 Malaysia Parliament All the 13 State Legislative Assemblies are unicameral.

Dewan Negara
Dewan Negara
(Senate) Dewan Rakyat
Dewan Rakyat
(House of Representatives)

 Mexico Congress All the 31 State Congresses and the Legislative Assembly of the Federal District are unicameral.

Senate Chamber of Deputies

 Myanmar Pyidaungsu Hluttaw (Assembly of the Union) All the 14 State and Region Hluttaw (Assemblies) are unicameral.

Amyotha Hluttaw (House of Nationalities) Pyithu Hluttaw (House of Representatives)

   Nepal Parliament [23]

Pratinidhi Sabha (House of Representatives) Rashtriya Sabha (National Assembly)

 Netherlands States General

Eerste Kamer Tweede Kamer

 Nigeria National Assembly

Senate House of Representatives

 Oman Parliament

Majlis al-Dawla (Council of State) Majlis al-Shura (Consultative Assembly)

 Pakistan Parliament All of the provincial assemblies are unicameral.

Senate National Assembly

 Palau National Congress

Senate House of Delegates

 Philippines Congress All local legislatures are unicameral.

Senate House of Representatives

 Poland National Assembly

Senate Sejm
Sejm
(Diet)

 Romania Parliament

Senate Chamber of Deputies

 Russian Federation Federal Assembly All the regional legislatures are now unicameral while bicameralism in regions is technically allowed by the Federation.

Federation
Federation
Council State Duma

 Saint Lucia Parliament

Senate House of Assembly

 South Africa Parliament All of the provincial legislatures are unicameral.

National Council of Provinces National Assembly

 Spain Cortes Generales Moreover, each Spanish autonomous region has its own unicameral regional parliament, with wide-ranging legislative powers on their own.

Senate Congress
Congress
of Deputies

  Switzerland Federal Assembly All of the cantons have unicameral parliaments.

Council of States National Council

 United Kingdom Parliament Scotland, Wales
Wales
and Northern Ireland
Northern Ireland
have devolved unicameral legislatures with limited devolved powers.

House of Lords House of Commons

 United States Congress All of the state legislatures, except Nebraska, are also bicameral. The Legislative Assembly of Puerto Rico
Legislative Assembly of Puerto Rico
is bicameral. The Council of the District of Columbia is unicameral.

Senate House of Representatives

 Trinidad and Tobago Parliament

Senate House of Representatives

 Uruguay General Assembly

Senate Chamber of Representatives

 Uzbekistan Supreme Assembly

Senate Legislative Chamber

 Zimbabwe Parliament

Senate House of Assembly

Historical[edit]

 Denmark Rigsdagen Under the constitution Rigsdagen was created, with two houses, an upper and lower house. However, after the 1953 referendum, both Rigsdagen and the Landsting was abolished, making the Folketing
Folketing
the sole chamber of the parliament.

Landsting (Upper house) Folketing
Folketing
(Lower house)

 Greece Parliament
Parliament
of the Hellenes The Senate
Senate
as an upper chamber was established by the Greek Constitution of 1844, of the Kingdom of Greece, and was abolished by the Greek Constitution of 1864. The Senate
Senate
was reestabished by the republican Constitution of 1927, which establishing the Second Hellenic Republic
Republic
and was disestablished by the restoration of the Kingdom of Greece
Greece
at 1935.

Gerousia (Senate) Vouli (Chamber of Deputies)

 Korea, South National Assembly Under the first constitution (first republic, 1948–52), the National Assembly was unicameral. The second and third constitutions (first republic, 1952–60) regulated the National Assembly was bicameral and consisted of the House of Commons
House of Commons
and the Senate, but only the House of Commons was established and the House of Commons
House of Commons
could not pass a bill to establish the Senate. During the short-lived second republic (1960–61), the National Assembly became practically bicameral, but it was overturned by the May 16 coup. The National Assembly has been unicameral since its reopen in 1963.

Senate House of Commons

 New Zealand Parliament Until 1950, the New Zealand
New Zealand
Parliament
Parliament
was bicameral. It became unicameral in 1951, but the name "House of Representatives" has been retained.

Legislative Council House of Representatives

 Peru Congress Under the 1993 constitution, the bicameral system was replaced by the unicameral Congress
Congress
of the Republic.

Senate Chamber of Deputies

 Portugal Cortes During the period of Constitutional Monarchy, the Portuguese Parliament
Parliament
was bicameral. The lower house was the Chamber of Deputies and the upper house was the Chamber of Peers (except during the 1838-1842 period, where a Senate
Senate
existed instead). With the replacement of the Monarchy by the Republic
Republic
in 1910, the Parliament continued to be bicameral with a Chamber of Deputies and a Senate existing until 1926.

Chamber of Deputies Chamber of Peers

 Sweden Riksdagen Until 1970, the Swedish Riksdag
Riksdag
was bicameral. It became unicameral in 1971, but retained the name Riksdag.

Första kammaren
Första kammaren
(Upper house) Andra kammaren
Andra kammaren
(Lower house)

 Turkey Parliament It was established with the Turkish constitution of 1961
Turkish constitution of 1961
and abolished with the Turkish constitution of 1982, although it did not exist between 1980 and 1982 either as a result of the 1980 coup d'état in Turkey.

National Assembly Senate
Senate
of the Republic

 Venezuela Congress Under the 1999 constitution, the bicameral system was replaced by the unicameral National Assembly of Venezuela.

Chamber of Deputies Senate

 Mauritania Parliament Under the 2017 Referendum, the bicameral system was replaced by the unicameral system.

Senate National Assembly

References[edit]

^ "IPU PARLINE database: Structure of parliaments". www.ipu.org. Retrieved 25 October 2015.  ^ a b c d The Constitutional Background - House of Representatives archives ^ Estates-General in Encyclopædia Britannica ^ Seidle, F. Leslie; Docherty, David C. (2003). Reforming parliamentary democracy. McGill-Queen's University Press. p. 3. ISBN 9780773525085.  ^ Julian Go (2007). "A Globalizing Constitutionalism?, Views from the Postcolony, 1945-2000". In Arjomand, Saïd Amir. Constitutionalism and political reconstruction. Brill. pp. 92–94. ISBN 9004151745.  ^ "How the Westminster Parliamentary System was exported around the World". University of Cambridge. 2 December 2013. Retrieved 16 December 2013.  ^ (in French) Liberation.fr, Sénat, le triomphe de l'anomalie ^ a b "Chapter 21: Relations with the House of Representatives". Odgers' Australian Senate
Senate
Practice (14th ed.). Parliament
Parliament
of Australia. Retrieved 19 February 2018.  ^ Jones, Clyve (2014). "Accommodation in the Painted Chamber
Painted Chamber
for Conferences between the Lords and the Commons from 1600 to 1834". Parliamentary History. 33 (2): 342–357. doi:10.1111/1750-0206.12100. ISSN 0264-2824.  ^ Blayden 2017 p.6; "Free Conference—Municipal Corporations' Act Amendment (, )". Hansard. 11 August 1836. HC Deb vol 35 cc1125–7. Retrieved 19 February 2018.  ^ Blayden 2017 p.6; "Managers for the Free Conference, on the Bill to prevent Commerce with Spain". House of Lords
House of Lords
Journal. British History Online. 22–24 April 1740. Volume 25, pp.518–526. Retrieved 19 February 2018.  ^ a b Blayden, Lynsey (September 2017). "Do free conferences have a place in the present-day NSW Parliament?" (PDF). Australasian Study of Parliament
Parliament
Group. Retrieved 19 February 2018.  ^ Crump, Rick (Spring 2007). "Why the conference procedure remains the preferred method for resolving disputes between the two houses of the South Australian Parliament". Australasian Parliamentary Review. 22 (2): 120–136.  ^ "Papers on Parliament
Parliament
No. 34 Representation and Institutional Change: 50 Years of Proportional Representation in the Senate". 1999. Retrieved 23 February 2017.  ^ According to the Bundesverfassungsgericht, BVerfGE 37, 363, Aktenzeichen 2 BvF 2, 3/73 ^ How do you become a Member of the House of Lords? - UK Parliament. Parliament.uk (21 April 2010). Retrieved on 2013-07-12. ^ Minerva.as ^ Constitution of the Federation
Federation
of Bosnia and Herzegovina ^ The National Assembly of the Republic
Republic
of Srpska ^ 2005 report Archived 5 July 2008 at the Wayback Machine. ^ Referendum turnout 50.95%. 77.78 said YES for a unicameral Parliament, 88.84% voted for the decrease in the number of Parliamentarians Archived 21 July 2011 at the Wayback Machine., Official results from the Romanian Central Electoral Commission ^ "Innovations of the Draft Constitution of Cote d'Ivoire: Towards hyper-presidentialism?".  ^ "Archived copy" (PDF). Archived from the original (PDF) on 23 December 2015. Retrieved 18 February 2016. 

External links[edit]

Noncontemporaneous Lawmaking: Can the 110th Senate
Senate
Enact a Bill Passed by the 109th House?, 16 Cornell J.L. & Pub. Pol'y 331 (2007). Aaron-Andrew P. Bruhl, Against Mix-and-Match Lawmaking, 16 Cornell J.L. & Pub. Pol'y 349 (2007). Defending the (Not So) Indefensible: A Reply to Professor Aaron-Andrew P. Bruhl, 16 Cornell J.L. & Pub. Pol'y 363 (2007).

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