It is still too early to bring up the issue of a national unity government although the constitution provides leeway for the idea, said Pornpetch Wichitcholchai, president of the National Legislative Assembly (NLA).
Mr Pornpetch said the political situation is unlikely to reach an impasse if all concerned parties follow the law. Even though the charter makes it possible for a national government without an opposition to be formed, it was premature to be discussing the issue.
He also urged critics to refrain from criticising those who are following the laws including the Election Commission (EC) which decided to ask the Constitutional Court review its method of calculating and allocating party-list seats.
Some politicians have contemplated a situation where neither the Pheu Thai Party nor the Palang Pracharath Party (PPRP) is likely to come up with a decisive majority in forming the next coalition government.
Asked about a suggestion that Section 270 of the charter should be invoked to allow the Senate to join the Lower House in voting on draft laws to get around the thin majority, Mr Pornpetch said there are specific conditions as to when the Senate can take part in the legislative process.
Earlier, Paiboon Nititawan, leader of the pro-regime People's Reform Party, said the section would help the PPRP-led coalition, should it form, push key bills especially the crucial budget bill into law with the government holding a thin majority.
Deputy Prime Minister Wissanu Krea-ngam also echoed Mr Pornpetch's view that there are limitations under Section 270 which is exclusively reserved for the passage of national reform bills.
"Reform bills will be examined by a joint sitting of the Senate and the House of Representatives. But certain bills are not reform bills by nature such as the budget bill. The Senate shouldn't be dragged into it," he said.
Meanwhile, Pheu Thai's legal expert Chusak Sirinil slammed Mr Paiboon for trying to muddle up the constitution by suggesting that Section 270 be used in the law-making process.
He said the budget bill has to be passed first by the House and then screened by the Senate, adding the charter itself is flawed with many contentious issues springing from it.