More equitable boundaries were subsequently put in place following the 1968, 1975, and 1989 elections. More seats were introduced, and seats were required to be proportionate, as well as having a unique fairness clause which directed the Electoral Commission of South Australia to redraw boundaries after each election, with the objective that the party which received over 50 percent of the statewide two-party vote at the forthcoming election should win the two-party vote in a majority of seats. This clause was removed from the State constitution in 2017.