Last Updated on October 9, 2026 by Jeff Tomas
BANGKOK– A censure motion gives Thailand’s House of Representatives a formal way to challenge a minister or the entire Cabinet and test whether they still have political support. Under Section 151 of the 2017 Constitution, at least one-fifth of existing House members can file the motion, and a no-confidence resolution must win more than half of all existing members.
Section 152 follows a different process: it allows a smaller group of MPs to call a debate to question the government or recommend action, but the House can’t pass a confidence resolution through that procedure.
This guide explains how the filing threshold and vote work under the 2017 Constitution, rather than older rules, and why the distinction matters during political disputes such as Thailand’s election tensions amid a looming censure motion .
Key Takeaways
- Section 151 lets House members seek a no-confidence vote against an individual minister or the Council of Ministers as a whole.
- At least one-fifth of existing House members must support filing; the motion does not count senators toward this threshold.
- A no-confidence resolution needs more than half of all existing House members to pass. For a 500-member House, that means at least 251 votes.
- The House generally cannot be dissolved while the motion is pending, except in the circumstances set out in Section 151. The 2017 Constitution’s English translation provides the full wording.
- Section 152 permits a debate but no confidence vote. Recent opposition censure plans show how Section 151 can become a live political test.
Section 151: How Thailand’s Censure Motions Work
Section 151 of Thailand’s 2017 Constitution sets out a formal House procedure for seeking a no-confidence resolution. It gives qualifying MPs a way to challenge a minister or the government as a whole, then requires the House to decide through a vote. That makes a censure motion different from a general debate, where members can criticize the government without asking the House to withdraw its confidence.
Who can bring a motion, and who can it target?
Only members of the House of Representativescan submit a Section 151 motion. Senators do not count toward the filing threshold and cannot initiate this procedure. The constitutional text requires support from at least one-fifth of the House’s existing members.
The motion may target an individual ministeror the Council of Ministers as a whole. Once the debate reaches the required stage, House members vote on confidence or no confidence. The vote takes place on a later date, rather than on the day the debate concludes. The 2017 Constitution’s Section 151 provisions set out the procedure and the voting threshold.
This process is not an impeachment case. Section 151 concerns whether the House retains confidence in a minister or Cabinet. It does not, by itself, make a finding of legal or constitutional wrongdoing. Other constitutional and judicial procedures address separate questions, as seen in the Constitutional Court’s review of Paetongtarn Shinawatra .
Why this vote can put the government under pressure
A censure motion gives opposition MPs a parliamentary forum to present allegations and challenge government decisions. The debate puts those arguments on the record, where ministers must respond and governing-party members face a public choice when the House votes.
That pressure is political, not automatic. Criticism during the debate does not remove a minister from office, and filing a motion does not guarantee its passage. The decisive step is the vote: if the House passes a no-confidence resolution with the required support, the constitutional consequences follow. If it does not, the motion has still forced the government to defend its record in Parliament and shown how members chose to stand.
How a Section 151 Motion Moves From Signatures to a Vote
Section 151 sets two distinct numerical tests: enough House members must support filing the motion, and more than half of all existing members must later vote for no confidence. Both thresholds use the House’s existing membership, not just the members who attend the debate or cast a vote.
The one-fifth filing threshold
A motion can be submitted when at least one-fifth of the total number of existing House members support it. Those members must come from the House of Representatives; senators do not count toward the threshold. The motion may seek a no-confidence vote against an individual minister or the Council of Ministers as a whole.
If all 500 House seats are held, at least 100 membersmust submit the motion. The required number can change if the number of members holding seats changes, because the calculation follows the existing membership rather than a fixed 500-seat figure. The English translation of Thailand’s Constitution sets out the one-fifth requirement.
Once filed, the motion leads to a general debate. While it remains pending, the House generally cannot be dissolved, subject to the exceptions in Section 151, including withdrawal of the motion or its failure to win the required support.
Debate, allegations, and the final confidence vote
During the debate, opposition members present their allegations and explain why they believe the minister or Cabinet should lose the House’s confidence. The government then has an opportunity to respond. This stage puts competing claims before the House, but the debate itself does not remove anyone from office.
After the debate concludes, the House votes on the no-confidence resolution on a later date. That timing separates the debate from the decision and gives members a distinct vote on whether they retain confidence in the target. The constitutional text does not set a fixed number of debate hours, so the process should not be reduced to a presumed timetable.
How many votes are needed to pass it?
The resolution passes only if it receives more than half of the total number of existing House members. With 500 members, that means at least 251 votes. A majority of the members present or voting is not enough if it falls below that constitutional threshold.
As a result, absence and abstention can make passage harder in practice. Neither lowers the number of yes votes required, so members who do not vote for the resolution leave its supporters with fewer votes toward the same target. That arithmetic can matter when the government’s majority is narrow, as reports on Thailand’s coalition and no-confidence vote pressure illustrate.
What happens after the vote, and how does dissolution affect the process?
The outcome matters both inside Parliament and for the government’s next steps. A passed motion is a formal loss of confidence, while a failed motion leaves the target in place through that vote. Dissolution raises a separate timing question: under Section 151, the key point is whether the motion has been submitted.
A successful or failed motion has different political effects
If the House passes a no-confidence resolution, the government suffers a serious parliamentary defeat. The 2017 Constitution also sets legal consequences: a minister targeted individually loses office after the House passes no confidence in that minister, while a resolution against the Council of Ministers affects the Cabinet as a whole. The political response may include resignations or a change in government, but those steps should not be confused with the constitutional effect of the vote itself.
If the motion fails to win more than half of all existing House members, the target remains in office through that vote. However, the debate and vote can still leave the government under pressure. Opposition members may continue to challenge its decisions, and governing-party MPs’ support, or lack of support, can shape what happens next.
What the December 2025 episode does, and does not, show
In December 2025, after a parliamentary vote on constitutional amendments, People’s Party leaders said they planned to pursue a Section 151 motion. Prime Minister Anutin Charnvirakul then sought dissolution, and the House was dissolved before the opposition’s planned submission. The episode was not a completed censure debate or vote. Reports described a planned motion, not one formally lodged before dissolution.
That sequence matters because Section 151 says dissolution is not permitted aftera qualifying motion has been submitted, except in specified circumstances, including withdrawal or failure to secure the required support. An announcement or plan to file is not the same as submission. The official announcement of the House’s dissolution cites Sections 103 and 175; it does not establish what would have happened if the opposition had filed first. For more on the election timetable that followed, see Thailand’s December 2025 House dissolution and election timeline .
The episode therefore cannot prove that a prime minister may dissolve the House after a Section 151 motion has been filed. The current 2017 rule turns on submission, and reports about events before filing, or references to older constitutional provisions, should not be treated as evidence of a different rule.
Section 151 and Section 152 Serve Different Purposes
Both sections give House members a way to question the government, but only one puts the Cabinet’s confidence to a vote. The distinction is whether the House must decide if a minister or the government should remain in office.
Section 151 asks the House to decide confidence
Section 151 is the censure procedure described above. A no-confidence resolution is put to a vote, and it must meet the required passage threshold to succeed. The debate gives members a chance to present and answer allegations, but the House’s vote determines whether it formally withdraws confidence.
That makes Section 151 different from criticism during an ordinary parliamentary debate. A sharp exchange or serious accusation does not itself remove a minister or Cabinet; the constitutional vote is the decisive step.
Section 152 allows scrutiny without a confidence vote
Section 152 provides a general debate on matters of state administration. Members can ask the prime minister or ministers to explain government actions, raise problems, and recommend responses. However, the House cannot pass a resolution on the matter under debate, so this procedure does not produce either a confidence or no-confidence vote. Criticism under Section 152 does not, by itself, remove the government.
Section 152 also says a motion may be submitted only once in each session. Section 154 adds an annual limit: a motion for a general debate under Sections 151, 152, or 153 may be submitted once a year. Its exception applies to a Section 151 debate that concludes with a resolution to pass over the debate agenda. The text does not provide the same exception for Section 152, so check the current constitutional text for the precise scope of these rules.
Frequently Asked Questions
A few details can still affect how a Section 151 motion works in practice, especially when Parliament considers repeat motions or targets several ministers.
Can a Section 151 motion target more than one minister?
Yes. Section 151 allows MPs to seek a no-confidence vote against an individual minister or the Council of Ministers as a whole. A motion can identify multiple ministers as its targets; in October 2026, for example, the opposition filed a motion against 18 ministers. The reported motion against 18 Thai ministers shows how the procedure can be used against several members of the government.
Can opposition MPs file another censure motion in the same year?
Usually, no. Section 154 generally limits motions for a general debate under Sections 151, 152, or 153 to once per year. However, that limit does not apply when a Section 151 debate ends with a House resolution to pass over the debate agenda, which is different from holding a no-confidence vote and losing it. The English text of Thailand’s 2017 Constitution sets out this exception.
Does a failed no-confidence vote prove that the allegations were false?
No. A failed vote means the resolution did not receive the number of votes required to pass. It does not establish whether the allegations were true or false, and it is not a court judgment. The result records the House’s decision on confidence, not a legal finding about each claim made during debate.
What if a minister resigns before the House votes?
A resignation changes the minister’s status, but it is not the same as a no-confidence resolution. Section 151 sets out the House’s voting process, while the Constitution separately governs when ministers leave office. Because the result can depend on timing and the status of the motion, reports of a resignation should be checked against the formal parliamentary record.
Does a Section 151 motion need to prove a criminal offense?
No. MPs use the motion to ask whether the House retains confidence in a minister or the Cabinet. They may raise alleged misconduct or policy failures, but the vote itself does not convict anyone or replace a criminal investigation. A separate legal process is needed to determine criminal liability.
