16/09/2026
AMICI CURIAE TACKLE IMPEACHMENT VOTING THRESHOLD
MANILA — The Senate Impeachment Court heard on Wednesday, September 16, the respective positions of former Supreme Court Chief Justices Hilario Davide, Jr., Artemio Panganiban, Reynato Puno, and former Associate Justice Adolfo Azcuna, who appeared as amici curiae, on the issue of how the constitutional two-thirds (⅔) voting requirement should be interpreted.
The central issue is Article XI, Section 3(6) of the 1987 Philippine Constitution, which reads, “No person shall be convicted without the concurrence of two-thirds of all the Members of the Senate.”
Davide, Jr., who served as Chief Justice from 1998 to 2003 and a member of the 1986 Constitutional Commission, maintained that “all members” should refer to persons who are living and physically and legally capable of discharging their duties as Senators. Although Davide could not personally appear before the Impeachment Court, his views were contained in a legal memorandum delivered by Impeachment Clerk of Court Renato Bantug.
Panganiban, who succeeded Davide as Chief Justice from 2005 to 2007, argued for a more liberal construction of the constitutional two-thirds requirement in light of the circumstances surrounding the present impeachment proceedings. The former Chief Justice rejected what he characterized as an adherence to “abstract mathematics,” arguing that the two-thirds requirement, when applied to the circumstances before the Impeachment Court, would require the concurrence of 16 Senators.
Puno, successor of Panganiban as Chief Justice from 2006 to 2009, challenged the fixed numerical interpretation of the constitutional requirement. He opined that had the framers intended to establish a fixed threshold of 16 Senators, the Constitution could have expressly stated that number. Instead, the Constitution uses the fraction “two-thirds,” which he said indicates a baseline that may require contextual and functional interpretation.
Meanwhile, former Supreme Court Associate Justice Adolfo Azcuna, who served from 2002 to 2009 and was also a member of the 1986 Constitutional Commission, took a strict textual position on the provision. He maintained that the phrase “all the Members of the Senate” in Article XI, Section 3(6) refers to all 24 Senators, rejecting the interpretation that the requirement should instead be based on “participating members.”
It was a unanimous view for the amici curaie that the final threshold shall be determined not by the Supreme Court, but by the Impeachment Court. The Senate Impeachment Court is expected to settle the issue via a vote next week, September 23.
Words by Myle Ysobel Bayani
Graphics by Lei Mercado and Carli Recio III | thebarrister