The Constitution Drafting Committee (CDC) has proposed a five-day waiting period before a draft law passed by parliament can be submitted for royal endorsement.
CDC spokesman Udom Rathamarit said the waiting period is to allow MPs or senators who question the constitutionality of the draft to ask the Constitution Court for a review.
A petition seeking a judicial review requires the support of at least 10% of members of parliament, or about 70, he said. If no petition is submitted the draft can be submitted for royal endorsement within 20 days.
Under the proposed charter, the prime minister and cabinet ministers can answer questions in the House, but it will be left to the House to decide what kinds of motions they must answer in person.
Mr Udom said that in the past the prime minister and the cabinet ministers usually assigned others to answer motions on their behalf.
On no-confidence motions, he said the CDC has agreed the opposition can seek a censure debate against the prime minister. However, the opposition must submit a candidate for prime minister at the same time as it files the motion.
Mr Udom dismissed reports the CDC is considering a proposal in which the assets and debts of relatives of political office-holders will also be examined, in addition to those of their spouses and children.
Meanwhile, the Central Islamic Council of Thailand has submitted a petition to the CDC asking the panel to allocate a quota of Senate seats for representatives of the CICOT. Secretary-general Surin Parale said the proposed quota would help boost efforts in solving southern problems.
He said the committee had nominated its representatives for consideration under the previous charter, but they were not chosen.
He said that even though some senators were Muslim, they did not represent the CICOT, which works with Muslim people across the country.