Section 24Omnibus Election Code of the Philippines (Batas Pambansa Blg. 881), Sec. 24

Apportionment of representatives. - Until a new apportionment shall have been made, the Members of the Batasang Pambansa shall be apportioned in accordance with the Ordinance appended to the Constitution, as follows:

National Capital Region:

Manila, 6;

Quezon City, 4;

Caloocan, 2;

Pasay, 1;

Pasig and Marikina, 2;

Las Piñas and Parañaque, 1;

Makati, 1;

Malabon, Navotas and Valenzuela, 2;

San Juan and Mandaluyong, 1;

Taguig, Pateros and Muntinglupa, 1.

Region I:

Abra, 1;

Benguet, 1;

Ilocos Norte with Laoag City, 2;

Ilocos Sur, 2;

La Union, 2;

Mountain Province, 1;

Pangasinan with the cities of Dagupan and San Carlos, 6;

Baguio City, 1.

Region II:

Batanes, 1;

Cagayan, 3;

Ifugao, 1;

Isabela, 3;

Kalinga-Apayao, 1;

Nueva Vizcaya, 1;

Quirino, 1.

Region III:

Bataan, 1;

Bulacan, 4;

Nueva Ecija with the cities of Cabanatuan, Palayan and San Jose, 4;

Pampanga with Angeles City, 4;

Tarlac, 2;

Zambales, 1;

Olongapo City, 1.

Region IV:

Aurora, 1;

Batangas with the cities of Batangas and Lipa, 4;

Cavite with the cities of Cavite, Tagaytay and Trece Martires, 3;

Laguna with San Pablo City, 4;

Marinduque, 1;

Occidental Mindoro, 1;

Oriental Mindoro, 2;

Palawan with Puerto Princesa City, 1;

Quezon with Lucena City, 4;

Rizal, 2;

Romblon, 1.

Region V:

Albay with Legaspi City, 3;

Camarines Norte, 1;

Camarines Sur with the cities of Iriga and Naga, 4;

Catanduanes, 1;

Masbate, 2;

Sorsogon, 2.

Region VI:

Aklan, 1;

Antique, 1;

Capiz with Roxas City;

Iloilo with Iloilo City, 5;

Negros Occidental with the cities of Bacolod, Bago, Cadiz, La Carlota, San Carlos and Silay, 7.

Region VII:

Bohol with Tagbilaran City, 3;

Cebu with the cities of Danao, Lapu-Lapu, Mandaue and Toledo, 6;

Negros Oriental with the cities of Bais, Canlaon and Dumaguete, 3;

Siquijor, 1;

Cebu City, 2.

Region VIII:

Leyte with the cities of Ormoc and Tacloban, 5;

Southern Leyte, 1;

Eastern Samar, 1;

Northern Samar, 1;

Samar with Calbayog City, 2.

Region IX:

Basilan, 1;

Sulu, 1;

Tawi-Tawi, 1;

Zamboanga del Norte with the cities of Dapitan and Dipolog, 2;

Zamboanga del Sur with Pagadian City, 3;

Zamboanga City, 1.

Region X:

Agusan del Norte with Butuan City, 1;

Agusan del Sur, 1;

Bukidnon, 2;

Camiguin, 1;

Misamis Occidental with the cities of Oroquieta, Ozamis and Tangub, 1;

Misamis Oriental with Gingoog City, 2;

Surigao del Norte with Surigao City, 1;

Cagayan de Oro City, 1.

Region XI:

Surigao del Sur, 1;

Davao del Norte, 3;

Davao Oriental, 1;

Davao del Sur, 2;

South Cotabato with General Santos City, 3;

Davao City, 2.

Region XII:

Lanao del Norte, 1;

Lanao del Sur with Marawi City, 2;

Maguindanao with Cotabato City, 2;

North Cotabato, 2;

Sultan Kudarat, 1;

Iligan City, 1.

Any province that may hereafter be created or any component city that may hereafter be declared by or pursuant to law as a highly urbanized city shall be entitled in the immediately following election to at least one Member or such number of Members as it may be entitled to on the basis of the number of the inhabitants and on the same uniform and progressive ratio used in the last preceding apportionment. The number of Members apportioned to the province out of which the new province was created or where the new highly urbanized city is geographically located shall be correspondingly adjusted by the Commission, but such adjustment shall not be made within one hundred twenty days before the election.