The 2005 Bolivian legislative election was held simultaneously with the presidential election on 18 December2005. The elections were held to elect a new National Congress, comopsed of the Chamber of Deputies and Senate, for a full four-year term. The 2005 Bolivian presidential election was held on December 18, 2005. ... December 18 is the 352nd day of the year (353rd in leap years) in the Gregorian Calendar. ... 2005 (MMV) is a common year starting on Saturday of the Gregorian calendar. ... The National Congress (Spanish: Congreso Nacional) is the national legislature of Bolivia, based in the capital of La Paz. ...
Bolivians cast two ballots for national officials: one for a party and one for their single-member district representative in the Chamber of Deputies. The party vote applies to the presidential race, to Senators and to the Chamber of Deputies proportional representatives. Senators and deputies are returned on a departmental basis; senators are elected on a majoritarian basis, with the first-place party receiving two and the second-place party one, while deputies are elected on a mixed-member basis, with district deputies joining list deputies awarded by compensatory proportional representation. However, there is no national distribution of seats. Bolivia is divided into nine departments (capitals in parentheses)- Departmento Beni (Trinidad) Departmento Chuquisaca (Sucre) Departmento Cochabamba (Cochabamba) Departmento La Paz (La Paz) Departmento Oruro (Oruro) Departmento Pando (Cobija) Departmento Potosí (Potosí) Departmento Santa Cruz (Santa Cruz) Departmento Tarija (Tarija) Each of the departments is subdivided into provincias. ... Proportional representation (PR) is an election system which ensures a proportionally representative result of a democratic election, x% of votes should be represented by x% in the democratic institutions, parliament or congress. ...