King Hussein had to intervene from his sickbed to sack the prime minister and appoint a replacement.

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Rowland to appoint a replacement to fill the Senate seat until a special election is held in 2002.

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Paterson has the power to appoint a replacement, who then will face a special election in 2010 to fill out Clinton's term.

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However Mr Nesbitt has responded swiftly - by stripping Mr McCallister of his deputy leader's job and reviewing whether the party needs to appoint a replacement.

BBC: John McCallister

If nominated by the president and confirmed by his colleagues in the Senate, Kerry would leave Congress, and Deval Patrick, Massachusetts' Democratic governor, would appoint a replacement.

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Telenor, which holds a two thirds stake in Unitech Wireless, has asked that Sanjay Chandra step down as chairman of their telecom joint venture and that Unitech should appoint a replacement.

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Murray, the world number four, has been without a coach since sacking Miles Maclagan in July and had been hoping to appoint a replacement before his next tournament in Beijing, which begins on 4 October, but a decision is not imminent.

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This has not been the recent practice, and it means that Presidents could not wait, say, until a recess in December to appoint a controversial replacement for a Secretary of State who resigned in October.

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Blagojevich had the power to appoint Obama's replacement and allegedly discussed doing so in exchange for either receiving a job with a nonprofit or union organization, a corporate board seat for his wife, campaign funds or a U.S. Cabinet post or ambassadorship.

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