Transitory Provision Fourth of the Statute established a specific electoral procedure for elections to the Parliament of Catalonia, of application for as long as a specific law regulating the procedures for regional elections was not approved, to be supplemented by the provisions within the Organic Law of General Electoral Regime. Voting for the Parliament was on the basis of universal suffrage, which comprised all nationals over eighteen, registered in Catalonia and in full enjoyment of their political rights. The 135 members of the Parliament of Catalonia were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which included blank ballots—being applied in each constituency. Seats were allocated to constituencies, corresponding to the provinces of Barcelona, Girona, Lleida and Tarragona, with each being allocated a fixed number of seats: 85 for Barcelona, 17 for Girona, 15 for Lleida and 18 for Tarragona.