Elections in Spain encompass four different types: general elections, regional elections, local elections, and elections to the European Parliament. General elections and regional elections are typically conducted at the conclusion of the national or regional legislative mandate, which usually spans four years since the previous election. However, early elections can be called in certain circumstances. On the other hand, local council elections (including municipal and insular elections) and elections to the European Parliament follow fixed dates, although some local government bodies, such as provincial councils, are not directly elected. In most elections, a party-list proportional representation (PR) system is employed, while the Senate utilizes the plurality system. General elections in Spain General elections are elections held for the national legislature, which is called in Spain Cortes Generales (Spanish for "General Courts") and consists of two chambers, the Congress of Deputies and the Senate. The Congress and Senate usually serve concurrent terms that run for a maximum of four years. However, the Prime Minister has the prerogative to dissolve both Houses at any given time either jointly or separately. The Congress is composed of 350 members directly elected by universal adult suffrage for a four-year term of office. Each one of Spain's fifty provinces is a constituency entitled to an initial minimum of two seats; the cities of Ceuta and Melilla elect one member each. The remaining 248 seats are allocated among the fifty provinces in proportion to their populations. Parties, federations, coalitions and agrupaciones de electores (electors' groups) may present candidates or lists of candidates. The lists are closed, so electors may not choose individual candidates in, or alter the order of, such lists. Electors cast a ballot for a single list, or for a single candidate in Ceuta and Melilla. The seats in each constituency are apportioned according to the largest average method of proportional representation (PR), conceived by the Belgian mathematician Victor d'Hondt in 1899 (d'Hondt method).
Patrick Thiran, Matthias Grossglauser, Julien Pierre Sacha Herzen, Vincent Etter