SECTION 1. Legislative Districts. - The Province of Isabela is hereby reapportioned into six (6) legislative districts to commence in the next national and local elections after the effectivity of this Act. Each district shall be composed of the following:
(a) FIRST LEGISLATIVE DISTRICT:
(1) Iligan City
(2) Cabagan
(3) Delfin Albano
(4) Divilacan
(5) Maconacon
(6) Tumauini
(7) San Pablo
(8) Sta. Maria
(9) Sto. Tomas
(b) SECOND LEGISLATIVE DISTRICT
(1) Benito Soliven
(2) Palanan
(3) Naguilian
(4) Reina Mercedes
(5) San Mariano
(6) Gamu
(c) THIRD LEGISLATIVE DISTRICT:
(1) Alicia
(2) Cabatuan
(3) San Mateo
(4) Ramon
(5) Angadanan
(d) FOURTH LEGISLATIVE DISTRICT:
(1) Santiago City
(2) Cordon
(3) Dinapigue
(4) San Agustin
(5) Jones
(e) FIFTH LEGISLATIVE DISTRICT
(1) Aurora
(2) Burgos
(3) Luna
(4) Mallig
(5) Quezon
(6) Quirino
(7) Roxas
(8) San Manuel
(f) SIXTH LEGISLATIVE DISTRICT:
(1) Cauayan City
(2) Echague
(3) San Guillermo
(4) San Isidro