23/09/2026
CONSTITUTIONAL GUARDRAILS: THE 2/3 SENATE VOTE, AND THE RIGID FRAMEWORK OF THE 1987 PHILIPPINE CONSTITUTION
The 1987 Philippine Constitution was designed with a system of stringent checks and balances, embedding supermajority requirements to ensure that the most critical acts of state are subjected to rigorous scrutiny. Among the most vital of these mechanisms is the requirement for a TWO-THIRDS (2/3) VOTE OF ALL THE MEMBERS of the Senate. Understanding the mathematical and legal rigidity of this requirement necessitates an examination of Senate membership, the hierarchy of laws, and the exclusive power of the Supreme Court to interpret the fundamental law of the land.
🔵 THE 2/3 VOTE REQUIREMENT OF "ALL THE MEMBERS" OF THE SENATE 🔵
The Constitution specifically mandates a two-thirds vote of ALL the members of the Senate—not merely a quorum—for acts that significantly impact national sovereignty, democratic representation, and executive oversight. The framers intentionally used the phrase "ALL THE MEMBERS" to lock the base number (mathematically 24, as the Senate is composed of 24 Senators) regardless of absences.
This stringent threshold is required in the following constitutional instances:
• CONCURRENCE IN TREATIES: No treaty or international agreement shall be valid and effective unless concurred in by at least two-thirds of all the Members of the Senate (Article VII, Section 21).
• IMPEACHMENT CONVICTION: The Senate has the sole power to try and decide all cases of impeachment. Conviction requires the concurrence of two-thirds of all the Members of the Senate (Article XI, Section 3, Paragraph 6).
• OVERRIDING A PRESIDENTIAL VETO: To override a veto, two-thirds of all the Members of the House where the bill originated, and subsequently two-thirds of all the Members of the other House, must pass the bill (Article VI, Section 27, Paragraph 1).
• SUSPENSION OR EXPULSION OF A MEMBER: Each House may punish its Members for disorderly behavior, and with the concurrence of two-thirds of all its Members, suspend or expel a Member (Article VI, Section 16, Paragraph 3).
• DECLARATION OF A STATE OF WAR: The Congress, by a vote of two-thirds of both Houses in joint session assembled, voting separately, shall have the sole power to declare the existence of a state of war (Article VI, Section 23, Paragraph 1).
⚠️ WHEN A SENATOR IS NOT CONSIDERED A MEMBER ⚠️
The strict requirement of a 2/3 vote of all members often raises the question of computation: when is a Senator officially removed from the denominator of 24?
A Senator is no longer considered a member of the Senate, and their seat is deemed permanently vacant, under specific constitutional and legal circumstances:
🔴 EXPIRATION OF TERM: The natural expiration of the six-year term (Article VI, Section 4).
🔴 FORFEITURE BY INCOMPATIBLE OFFICE: Under Article VI, Section 13, no Senator may hold any other office or employment in the Government during their term without forfeiting their seat. Acceptance of a cabinet post or an appointment automatically terminates their membership in the Senate.
🔴 EXPULSION: As noted above, a Senator is removed if expelled by a two-thirds vote of all members (Article VI, Section 16).
🔴 DEATH OR VOLUNTARY RESIGNATION: These acts create a permanent vacancy.
🔴 FINAL CONVICTION OF SPECIFIC CRIMES: A final judicial conviction carrying the accessory penalty of perpetual absolute disqualification from holding public office strips a Senator of their membership.
📌 NOTE ON SUSPENSIONS OR ABSENCES: Jurisprudence (such as in Santiago v. Guingona) affirms that temporary absences, travel abroad, or even preventive suspensions ordered by the Sandiganbayan DO NOT sever a Senator's membership. In such cases, the Senator remains part of the mathematical base; thus, the requirement for 2/3 of "ALL MEMBERS" remains firmly fixed at 16 out of 24, even if only 20 Senators are physically present or eligible to vote.
⚪ CAN A SIMPLE MAJORITY CHANGE THE 2/3 VOTE REQUIREMENT? ⚪
A simple majority of the Senate cannot change, bypass, or alter the two-thirds constitutional requirement.
The Constitution is the supreme law of the land. The internal rules of the Senate, which are adopted and can be amended by a simple majority vote of its members (Article VI, Section 16, Paragraph 3 allows each House to determine the rules of its proceedings), are subordinate to the Constitution. If a simple majority were to pass a resolution or amend the Senate Rules to allow a treaty to be ratified by a mere majority, or to compute the 2/3 vote based only on members present, such an act would be ultra vires and patently unconstitutional. Statutory law or internal legislative rules cannot diminish a constitutional mandate.
👨⚖️ THE SOLE POWER OF THE SUPREME COURT TO INTERPRET THE CONSTITUTION 👩⚖️
If a dispute arises regarding the computation of the 2/3 vote or an attempt by the Senate to bypass it, the resolution of that conflict falls squarely within the jurisdiction of the Supreme Court.
Article VIII, Section 1 of the 1987 Constitution vests judicial power in one Supreme Court and in such lower courts as may be established by law. This judicial power includes the duty "to determine whether or not there has been a grave abuse of discretion amounting to lack or excess of jurisdiction on the part of any branch or instrumentality of the Government."
Furthermore, Article VIII, Section 5, Paragraph 2(a) grants the Supreme Court the final appellate jurisdiction to review, revise, reverse, modify, or affirm on appeal or certiorari all cases in which the constitutionality or validity of any treaty, international or executive agreement, law, presidential decree, proclamation, order, instruction, ordinance, or regulation is in question.
Since the landmark case of ANGARA V. ELECTORAL COMMISSION, the Supreme Court has been recognized as the final arbiter of the Constitution. Congress cannot definitively interpret the limits of its own powers; the Court has the sole, ultimate authority to strike down legislative actions that deviate from constitutional requirements, including any attempt to subvert the 2/3 vote rule.
🟢 THE NEED FOR AMENDMENT OR REVISION 🟢
Because the two-thirds voting threshold is explicitly etched into the constitutional text, it is insulated from ordinary legislative modification. If lawmakers or the public wish to change these provisions—for instance, to make treaty concurrence easier by requiring only a simple majority—they CANNOT do so through legislation or Senate rules.
They must pursue a formal Constitutional Amendment or Revision, governed entirely by Article XVII:
1. CONGRESS VIA CONSTITUENT ASSEMBLY (CON-ASS): By a vote of three-fourths (3/4) of all its Members.
2. CONSTITUTIONAL CONVENTION (CON-CON): Called into existence by a two-thirds (2/3) vote of all Members of Congress, or by a majority vote of Congress submitting the question of calling a convention to the electorate.
3. PEOPLE’S INITIATIVE: For amendments (not revisions) through a petition of at least twelve per cent (12%) of the total number of registered voters, of which every legislative district must be represented by at least three per cent (3%) of its registered voters.
📌 Crucially, no amendment or revision becomes effective until it is ratified by a MAJORITY of the votes cast in a national plebiscite. Until such a rigorous democratic process is successfully completed, the 1987 Constitution stands exactly as written, and the TWO-THIRDS (2/3) requirement OF ALL THE MEMBERS OF THE SENATE remains an unbreakable legal ceiling.
⚖️ In Bautista Law, "We believe that power comes from the correct knowledge of the law."
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