Prior to gaining separate representation, areas formerly under the jurisdiction of Kalinga-Apayao were represented under the undivided Mountain Province (1917–1969).
The enactment of Republic Act No. 4695 on 18 June 1966 combined the sub-provinces of Apayao and Kalinga into a full-fledged province named Kalinga-Apayao.[1] The new province began electing its separate representative in 1969.
Apayao and Kalinga became separate provinces following the passage and subsequent ratification of Republic Act No. 7878 on May 8, 1995.[3] The new provinces began electing their separate representatives in the 1998 elections.
^ abCongressional Library Bureau. "Roster of Philippine Legislators". Republic of the Philippines, House of Representatives. Retrieved 17 February 2017.