KIEV (Reuters) -- Ukraine's parliament votes on Tuesday whether to restore Yulia Tymoshenko, an ardent advocate of Ukraine's ""Orange Revolution,"" to the post of prime minister nearly three years after she was sacked from the job.

Tymoshenko was formally put forward for the job by President Viktor Yushchenko after two ""orange"" parties won enough seats in a September election to form a wafer-thin coalition majority. Yushchenko and Tymoshenko reconciled during the campaign.
The two groups -- Tymoshenko's bloc and the pro-presidential Our Ukraine party -- hold 227 seats in the 450-member assembly -- just one more than needed to secure her election.
But deputies seemed certain that party discipline in the coalition would hold for the vote.
""I have no doubts about that,"" Yuri Yekhanurov, a former prime minister and close ally of the president, told a weekend television program.
""I have been brought up in a tradition of discipline. We said what we intend to do and we will do it.""
That unity helped last week to elect parliament speaker Arseniy Yatsenyuk, a member of the president's party, with 227 votes.
On the eve of the vote, the president said little about how he foresaw the vote. Quoted on his Internet site, he told Yatsenyuk he hoped the vote would ""take place in the framework of constructive work of the coalition and opposition.
""Members must display loyalty and respect for each others' opinions and, naturally, respect for the rules of parliament.""
Yatsenyuk last week said the line-up of a new government would also be approved on Tuesday, but there was no indication how procedures would work in what is often a fractious chamber.
Tymoshenko roused vast crowds during rallies that catapulted Yushchenko to power in 2004 and was named premier within days of his inauguration.
The two leaders quarreled and Tymoshenko frightened investors with attempts to intervene in markets and calls for a mass review of privatizations. Her government split into two camps, prompting Yushchenko to dismiss her within eight months.
Tymoshenko has been more reserved in the weeks since the election, but has promised to uphold the liberal, pro-Western ideals of the 2004 revolution.