Thailand is facing continued uncertainty over the formation of its new government, more than two months after the general election.

The vote to select a new prime minister, which was expected to take place later this week, has now been postponed, according to House of Representatives Speaker Wan Muhamad Noor Matha.

The delay comes as the Constitutional Court is being asked to rule on the legality of barring Move Forward Party leader Pita Limjaroenrat from being nominated as a prime ministerial candidate for a second time.

Pita's initial bid for the top post fell short by more than 50 votes, largely due to lack of support from the Senate. The Senate members, who were appointed by a military government, said they would not vote for Pita due to the party's call for reforming a law that makes it illegal to defame the royal family.

After last week's vote barring Pita from a second attempt, complaints were submitted to the state ombudsman, alleging a violation of the constitution. As a result of the ongoing uncertainties, the coalition led by Pita's party has announced that the Pheu Thai Party will nominate its candidate and take the leading role in forming a government.

However, there are also discussions of excluding Move Forward from the coalition in order to secure enough votes from conservative lawmakers. The delay in the vote will also allow lawmakers to celebrate King Maha Vajiralongkorn's 71st birthday on Friday. With the Constitutional Court yet to set a date for its decision, Thailand remains in a state of limbo as it waits for a new government to take office.