Creation of City of Greater Manila

Executive Order No. 400 creates the City of Greater Manila.
The city’s creation is effected by incorporating specific existing cities and municipalities into a single larger local political unit.

Executive Order No. 400 defines the territory of the City of Greater Manila to include the present City of Manila.
The territory includes Quezon City.
The territory includes all the territory comprised in the municipalities of Caloocan, San Juan, Mandaluyong, Makati, Pasay, and Parañaque.
The territorial coverage therefore spans the named local government units: Manila, Quezon City, and the six named municipalities (Caloocan, San Juan, Mandaluyong, Makati, Pasay, and Parañaque).

Executive Order No. 400 provides that, except where otherwise directed by the Mayor of Greater Manila or other competent authority, the laws applicable to the present city of Manila shall govern the territory comprised in Greater Manila.
This rule establishes continuity of legal application from the former City of Manila across the newly incorporated areas unless properly directed otherwise.

Executive Order No. 400 provides that the present mayors of Manila, Quezon City, and of the municipalities hereby incorporated shall serve as assistant Mayors of Greater Manila.
Each assistant mayor’s jurisdiction is limited within their respective existing city or municipal boundaries.
The arrangement preserves local jurisdictional limits while placing the named mayors within the Greater Manila leadership structure.