The president of the Constitutional Court can serve multiple three-year terms while the court's justices will serve nine years or until they are 70 under the new constitution.
This was different from the 2007 charter under which the president, as well as the justices, serves a nine-year term, said Lertrat Rattanavanich, a spokesman of the Constitutional Drafting Committee, after the meeting on Wednesday.
He added a constitutional court justice must have never served in other constitutional organisations to prevent people resigning from their existing positions in the hopes of being selected to join the powerful body.
If problems emerge on the duties and responsibilities of organisations such as the House, Senate, Parliament, cabinet or other organisations which are not courts or screening committees, they may also ask the Constitutional Court to rule.
The new charter also allows leader of the opposition to submit such conflict for the court to rule. In the old charter, only the speakers of the House, the Senate and parliament, as well as the prime minister or agencies which are parties to the conflict, are allowed to do so, he said.
Gen Lertrat did not say how the Constitutional Court justices come into office. But under the 2010 charter, they are selected by the half-appointed Senate. They comprise three Supreme Court judges, two Supreme Administrative Court justices, two legal experts and two public-administration experts.
Critics have urged for members of independent organisations, given their vast power, should be more closely related to voters, whether directly or indirectly.