National Reform Council (NRC) committees on justice and politics reforms have proposed that troublesome sections in the draft charter be cut, slashing the document from 315 sections to 118.
Although the Constitution Drafting Committee (CDC) intends to introduce measures to bring the country out of political unrest and give it improved administrative and legislative systems, the two NRC committees say many sections are "complicated, barely understandable and contentious", Seree Suwanpanont, chairman of the NRC committee on justice reforms said yesterday.
Among the sections the committees disagreed with is the CDC's proposal to allow a non-MP to become a prime minister.
Mr Seree said the move will only lead to conflict with pro-democracy groups.
Such a proposal is unacceptable even in principle, the NRC panel chairman added.
The two committees have resolved that the appointment of a premier this way, together with unnecessary sections, should be jettisoned, while other sections should be deleted and added to the charter's organic laws.
The NRC comments were made one day after the cabinet proposed 110 changes to the controversial draft charter, which has drawn opposition from NRC members and political parties.
The cabinet wants the CDC to delete sections 181 and 182.
The former enables a prime minister to call a vote in the Lower House on legislators' confidence in the premier. If the majority of the House vote against him or her, parliament can be dissolved.
The latter allows a prime minister to propose legislation, which raises fears over the possibility that a premier could try and revive the highly contentious bill to grant amnesty to political offenders.
The cabinet disagrees with the German-style voting system, known as mixed member proportional representation (MMP), which uses popular votes to determine the number of MPs for each party.
The cabinet fears MMP could mean difficult decisions for political parties in fielding election candidates and possible conflicts among party members.
In response to the cabinet's criticism, CDC spokesman Lertrat Rattanavanich said charter drafters are "ready to make changes" while they reconsider the draft.
Representatives from the NRC and the cabinet will be invited to clarify their suggestions between Tuesday and June 6.
Eight groups under the NRC will meet the CDC during the first four days, leaving the last day for meetings with the cabinet.
The CDC is confident it can finish draft amendments and forward them to the NRC for voting by July 23.