(This is a repetition of a story that first ran on Nov 23)
By Jana Mlcochova
PRAGUE, Nov 24 (Reuters) - A Czech court ruling on the European Union's reform treaty due on Tuesday may provide some comfort for Prime Minister Mirek Topolanek ahead of the country's EU presidency starting in January.
The Constitutional Court is due to rule whether the Lisbon treaty, meant to streamline EU decision-making in a bloc that has grown to 27 members, is in line with the Czech constitution.
A positive ruling would unfreeze the ratification process in parliament, although it could still be tough for Topolanek to overcome scepticism among his own backbenchers cheered on by the eurosceptic President Vaclav Klaus.
"In my opinion the court will rule that the treaty is in line ... that would go along with the much more convincing arguments of the parties supporting the treaty, such as the government," said Ivo Slosarcik, who focuses on institutional issues at the Europeum think-tank.
The Czech Republic is the only EU country that has not put the treaty to a vote. In 25 EU members, parliaments have approved the treaty. The document was only rejected in Ireland, which held a referendum earlier this year, and Irish leaders are considering ways to amend the decision.
In Germany and Poland, presidents must still sign off on the treaty, which needs approval by all EU members to enter force.
The Czechs' foot-dragging is among the reasons why their partners fear their EU presidency may be weak at a time when Europe needs strong leadership to fight the economic crisis.
"Without the Lisbon treaty the Czech presidency will have no credibility," said Andrew Duff, a member of the European Parliament.
NO EASY APPROVAL
While a positive ruling would not guarantee a quick and easy ratification -- Topolanek has said ratification would likely not be completed before the presidency starts -- a negative ruling would be a bigger problem.
It would mean parliament must first change the constitution before the treaty can be adopted. If the court rules that the treaty is not in line with the constitution, this could provide a strong reason for Topolanek's party rivals to drown the deal outright.
"They could hide behind the constitutional court, saying: We would have ratified, but we cannot," said Slosarcik.
Jaroslav Sovinsky from the constitutional law department at the Palacky University said the court would look at whether the treaty reduces national sovereignty, and the country should drop the treaty if that is the case.
President Klaus has dug his heels in against ratification by parliament.
He has refused to say if he will sign the treaty after its ratification -- which he must do to complete the process -- but has signalled he may hold out, saying there is no need to discuss the issue until the Irish change their mind.
Topolanek himself is no big fan of the document, but he considers it a price worth paying for being in the European club, which could stand up to an increasingly assertive Russia.
"It is far better ... to kiss the German chancellor than to hug the Russian bear," he wrote in an article earlier this week.
He has also said the treaty's approval, which needs a 60 percent majority, may hinge on opposition help to ratify a separate plan to build a U.S. missile defence radar on Czech soil. The leftist opposition strongly backs Lisbon but opposes the missile defence plan. (Writing by Jan Lopatka; Editing by Giles Elgood)