 In accordance with Section 7 of R.A. 4979, Agusan del Sur first elected its separate representative starting in the 1969 elections.Agusan del Sur was represented in the Interim Batasang Pambansa as part of Region X from 1978 to 1984, and returned one representative, elected at large, to the Regular Batasang Pambansa in 1984.Under the new Constitution which was proclaimed on February 11, 1987, the province constituted a lone congressional district, and it elected its member to the restored House of Representatives starting that same year.