The tribunal will announce its decisions in cases against the two main parties and three smaller ones at the Constitution Court on Wednesday.

"No matter what the verdicts our party will do all it can to prevent confrontation that could cause disturbance and hardship to society," Thai Rak Thai leader Chaturon Chaisang said.

He called on supporters to avoid the court because it offers limited public space.

"I don't want supporters to cause trouble for the police and they should not upset the concentration of judges and representatives of political parties," Chaturon said.

The Thai Rak Thai is preparing refreshments and an area for supporters outside its new headquarters.

Chaturon will meet with party executives and former members of Parliament in the evening following the rulings. An announcement about the party's future will be made in a bid to avert unrest.

Democrat spokesman Ongart Klampaiboon agreed supporters should avoid the court. "You don't have to go to the court to provide moral support to party executives.

"The party understands your feelings well. If you want to take part but don't want to watch it on television come to the party's head office," he said.

Democrat leader Abhisit Vejjajiva and party executives will pay homage to the statue of King Rama VII at Parliament on Wednesday morning before going to the Constitution Court to hear the rulings.

The Nation