48th ASEAN Leaders' Summit Plenary: Cebu Protocol Adopted (First Charter Amendment Since 2007), ASEAN Maritime Declaration Signed, Maritime Centre for Philippines Endorsed — COC Not Finalized

The 48th ASEAN Leaders' Summit concluded its full plenary on May 8, 2026 at Mactan Expo, Lapu-Lapu City, Cebu — the first time the Philippines has hosted the ASEAN Leaders' Summit as chair. Philippine President Ferdinand Marcos Jr. presided. The summit adopted three landmark outcomes: (1) The 'Cebu Protocol to Amend the Charter of ASEAN' — the first amendment to the ASEAN Charter since its original signing in November 2007 — primarily to formalize the constitutional accommodation of Timor-Leste as ASEAN's 11th member (which acceded in October 2025) and to update the charter's governance provisions for an 11-member bloc. (2) An ASEAN Leaders' Declaration on Maritime Cooperation, which formalizes the ASEAN Coast Guard Forum as a permanent sectoral body with an ongoing mandate, and endorses the establishment of an ASEAN Maritime Centre to be hosted by the Philippines — positioning Manila as the institutional anchor for maritime law enforcement coordination in Southeast Asia. Bloomberg reported that Southeast Asian leaders' embrace of the Maritime Centre reflected a shared goal of preventing a South China Sea scenario analogous to the Strait of Hormuz closure triggered by the 2026 Iran war, which disrupted global energy supply. (3) An ASEAN Leaders' Statement on the Middle East crisis, acknowledging the economic fallout from the Iran conflict on ASEAN member economies — particularly oil-import dependent members. The South China Sea Code of Conduct (COC) was not finalized, consistent with analyst forecasts: all sides reaffirmed the 2026 target for completing text-based negotiations while acknowledging that the COC's 'milestone issues' (geographic scope, legally binding status, enforcement mechanisms, third-party military activities) remain unresolved after nearly two decades of negotiations. Al Jazeera reported that ASEAN leaders confronted the compound effects of Iran-related energy and supply disruptions in the summit's economic discussions, underscoring how the Indo-Pacific's maritime security and global economic stability are increasingly interlinked. Singapore PM Lawrence Wong, Malaysia PM Anwar Ibrahim (2026 ASEAN Chair), and all 10 ASEAN heads of government attended. Timor-Leste PM Xanana Gusmão participated in a commemorative session marking full integration into ASEAN institutional structures.