The MMC became effectively defunct when on January 9, 1990, President Corazon Aquino issued Executive Order No. 392, in accordance to Article 18, Section 8 of the 1987 Philippine Constitution which replaced the commission with the Metropolitan Manila Authority (MMA). The Metro Manila mayors will choose from themselves as chairman. Jejomar Binay of the municipality of Makati served as its first chairman. The agency transferred to its present office at Guadalupe, Makati. Binay was followed by Ignacio Bunye of municipality of Muntinlupa in 1991, Ismael Mathay, Jr. of Quezon City in 1992 then Prospero Oreta of the municipality of Malabon in 1994.