Prime Minister Prayut Chan-o-cha is distancing himself from a proposal to revoke a clause under the constitution that reserves six seats in the Senate for military and police top brass.
"The issue should be left with the House committee which will decide whether it can be changed or not. I'm not involved," said Gen Prayut on Thursday, before telling reporters to ask the Speaker to elaborate on the idea.
The Speaker, Chuan Leekpai, raised the issue after the House of Representatives voted last month to set up a 49-member committee to study amendments to the 2017 constitution.
The charter -- which was drafted under the military regime -- has come under intense criticism for its alleged role in prolonging the now-defunct National Council for Peace and Order's (NCPO) stay in power.
The clause allows commanders of the army, navy, and air force, along with the chief of defence forces, defence permanent secretary and the national police chief to have a dual role as state officers and senators.
These figures, along with another 244 other people handpicked by the NCPO for the 250-member Senate, joined the 500 House MPs to vote in the prime minister after the March 24 election last year.
A member of the constitutional amendment committee, Somchai Srisutthiyakorn, agrees with Mr Chuan's proposal.
He said the military and police top brass should not be juggling such different jobs, before saying that their presence in the Senate is "for political reasons only".
"They are there to help prevent a coup in the future," said the former election commissioner.
That said, Mr Somchai questioned their ability to prevent a plot to topple the government, as the success of a coup still largely depends on the person who controls the army.
Meanwhile, Deputy Prime Minister Prawit Wongsuwon insisted the six senators who control the country's security apparatus have nothing to do with future coups.
"The NCPO wanted them to follow up their work in parliament, so they can have a better grasp of the problem and share information with other officers in their units," he said.
The proposal will need to be tabled by the committee members. If it is given a green light, it will be forwarded to the House.