 However residents of these areas remained represented by the Mountain Province's appointed assembly members until they were finally extended the right to vote in assembly district elections in 1935, after the passage of Act No.4203 placed them in the second district of Ilocos Sur.Ilocos Sur was represented in the Interim Batasang Pambansa as part of Region I from 1978 to 1984, and elected two representatives to the Regular Batasang Pambansa in 1984.