The ruling Thai Rak Thai Party is accused of hiring minor parties to contest the April 2 election, while the Democrat Party is accused of hiring a small party to frame the ruling party.

Poramate Intarachumnum, deputy spokesman for the Office of the Attorney-General, said the submissions were to be lodged with the court yesterday but had been delayed.

Pachara required additional time to fine-tune the statements, he said.

Besides the two main parties, the Progressive Democratic, Pattana Chart Thai and Thai Ground parties face charges.

The allegations against the Democrat Party do not include three claims made by an Election Commission investigation - not fielding candidates in the election, campaigning for voters to cast a "no vote" and attempting to seek a royally appointed prime minister.

The charges against the Democrats are boycotting the April 2 election, inciting Songkhla residents to obstruct registration of candidates in the April 23 by-election and soliciting false statements from the Progressive Democrat Party that the Thai Rak Thai Party paid small parties to run in repeat voting on April 23.