And withdraw the appointment of Kijal assemblyman Ahmad Said, as required by law, said Zaid Ibrahim who is Minister in the PM's Department.
That, he pointed out, was expected by the Constitution.
The palace appointment of Ahmad is not valid in the first place because he is someone without a majority, he said.
Zaid appealed to the palace to accept Idris, dismissing Ahmad's claims of support as hollow.
Barisan Nasional assemblymen have declared their backing for Idris, and BN chairman and Umno president Abdullah Ahmad Badawi endorsed Idris.
According to NST online, Zaid, the minister in charge of legal affairs, said the impasse over the appointment of Ahmad against the objections of a majority of the state's assemblymen should not have arisen.
"It's important for everyone, including the monarch, to respect the law, and in this case the law is quite clear," he said.
"The discretion of the monarch in appointing the menteri besar is not an absolute personal discretion.
"It has to be exercised in a way that the constitution expects," he said, which is to appoint the person whose command of a majority in the state assembly was "very clear".
"It is only in cases of a deadlock, where multiple parties are involved, that the ruler has the discretion to appoint the person he thinks has the support of the majority."
Meanwhile, Attorney-General Gani Patail was quoted by NST Online to have said that according to Article 145(2) of the Federal Constitution, he was duty-bound to advise the Yang di-Pertuan Agong on legal matters.
And the 23 assemblyman who are against Ahmad's appointment as MB have threatened to resigned if he is sworn-in.
State Umno liaison secretary Rosol Wahid told a Press conference last night that they all stood solidly behind Idris.
Read Bernama here.