Section 1. Any provision of law to the contrary notwithstanding, Region No. 4 is hereby divided into two regions to be known as Region No. 4 and Region No. 4-A.

Region No. 4 shall comprise the Metropolitan Manila area as contemplated in Presidential Decree No. 824, with the regional center either in Manila or Quezon City.

Region No. 4-A shall comprise the towns of Rizal not included in Metropolitan Manila and the provinces of Cavite, Laguna, Batangas, Quezon, Aurora (sub-province), Marinduque, Oriental Mindoro, Occidental Mindoro, Romblon and Palawan, and the cities of Batangas, Cavite, Lipa, Lucena, San Pablo, Tagaytay, Trece Martires and Puerto Princesa. Until otherwise decreed, the regional center for Region No. 4-A shall be in Metropolitan Manila.