The Constitutional Court on Wednesday accepted for consideration a petition filed by a group of senators arguing that caretaker Prime Minister Yingluck Shinawatra's order for the removal Thawil Pliensri from the post of National Security Council (NSC) secretary-general was in violation of Sections 182 (7) and 268 of the constitution, court spokesman Pimol Thampitakpong said.
The senators, led by Paiboon Nititawan, filed the petition, which is based on the Supreme Administrative Court ruling that the transfer of Mr Thawil to the position of prime minister's adviser was unlawful. The court ordered his reinistatement as NSC chief.
Political observers say the case could deliver a fatal legal blow to Ms Yingluck and her caretaker government because if the Constitutional Court rules against her, she and the entire cabinet would have to leave office.
A petition filed by caretaker Labour Minister and Centre for the Administration of Peace and Order (Capo) director Chalerm Yubamrung asking that the court order the People's Democratic Reform Committee (PDRC) to end its protest was also tabled at today's meeting of the judges.
Mr Chalerm argued that the PDRC protest was not peaceful and weapons-free, but breached Section 68 of the charter.
The Constitutional Court decided not to accept it for further consideration.