Legislation in the 15 Commonwealth countries where the Queen is head of state would also need amending.
There is but one precedent for a strong prime minister and a weak head of state.
The first African female head of state who may just get elected for a second term.
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Enough MPs remained in the chamber, however, to re-elect Mr Talabani as head of state.
That deal included recognizing Sanogo as former head of state, with a salary and mansion.
It is only the second time a Portuguese head of state has made such a move.
They claimed the seigneur is the "effective head of state" and the seneschal "the sole judge".
It not uncommon for a head of state to skip a military handover ceremony.
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When the Khmer Rouge moved into Phnom Penh in 1975, Sihanouk returned as head of state.
While the Queen is head of state, her involvement in day-to-day political decisions is largely formal.
Under the Dutch Constitution the king or queen is head of state but politically neutral.
Unlike other countries, the United States has yet to have a female head of state.
On most counts Mr Estrada is not the most impressive head of state in the region.
Grizzly-bearded, baggy-suited and humble in manner, Muhammad Morsi, Egypt's new head of state, fits the bill.
It is about the manner in which he has conducted himself as America's head of state.
The only head of state to address the proceedings was Iranian dictator Mahmoud Ahmadinejad.
But he must do it without plunging into politics, off-limits to the head of state.
The charter designates the National Assembly interim head of state if a president-elect cannot be sworn in.
Prosecutors are still deciding whether or not the head of state can be called as a witness.
He booted Luis Giusti, head of state-owned Petrleos de Venezuela -- and killed the ambitious oil expansion.
Relations between the regional powers have improved since Egyptians elected an Islamist head of state in June.
Mr Mbeki, who has served two terms, has to step down as head of state in 2009.
His friends lost, and a few months later he gave up his post as head of state.
Honduras is a representative democracy, where the President is both head of state and head of government.
During his three days in Pyongyang, Kim Dae Jung was accorded honors befitting a head of state.
Prince Sihanouk, as he was, briefly held the office of head of state under the Khmers Rouges.
He must not be indefinitely accepted as de facto head of state without the approval of the people.
Ireland's head of state President Michael D Higgins and Stormont First Minister Peter Robinson will also be there.
The first head of state to visit the United States was the leader of Brazil, Dom Pedro II.
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