Casual vacancy

Part of a series on
Politics
Primary topics Index of politics articles Politics by country Politics by subdivision Political economy Political history Political history of the world Political philosophy
Political systems Anarchism Capitalism City-state Communism Democracy Federacy Feudalism Mixed economy Dictatorship Directorialism Meritocracy Monarchy Parliamentary Presidential Semi-presidential Theocracy
Academic disciplines Political science (political scientists) International relations (theory) Comparative politics
Public administration Bureaucracy (street-level) Adhocracy
Policy Public policy (doctrine) Public interest Foreign policy
Organs of government Separation of powers Legislature Executive Judiciary Electoral branch
Related topics Sovereignty Theories of political behavior Political psychology Biology and political orientation Political organisations
Subseries Electoral systems Elections
Politics portal
v t e

In politics, a casual vacancy (casual in the sense of "by chance") is a situation in which a seat in a deliberative assembly is vacated during that assembly's term. Casual vacancies arise through the death, resignation or disqualification of the sitting member.

Casual vacancies have the effect of eliminating or reducing representation for the member's constituency. Accordingly, many jurisdictions provide by law for the speedy filling of vacant seats.

Casual vacancies can also occur in non-governmental assemblies, such as boards of directors and committees of voluntary organisations.

Australia

New Zealand

As of 2008, the New Zealand House of Representatives has 70 seats whose members represent geographical constituencies, and a further 52 seats selected from party lists. A vacancy in any of the 70 "electorate seats" is filled through a by-election. The writ for the by-election must, in most circumstances, be issued within 21 days of the notification of the vacancy. A by-election is not required if Parliament is due to expire within six months.

By contrast, a vacancy in one of the "list seats" is filled by the next available candidate on the list submitted by the party holding that seat.

United States

The phrase "casual vacancy" is not commonly used in the U.S. A vacancy in the House of Representatives is filled by a special election. The Constitution requires the executive authority of the state concerned to issue writs of election.

The seventeenth amendment provides that vacancies in the Senate are also filled by popular election, while allowing the legislature of the state concerned to pass laws authorising the state's governor to make a temporary appointment to the Senate until a popular election may be held.