Double simultaneous vote

Double simultaneous vote (DSV) is a feature of some electoral systems in which multiple offices – such as the president and members of a legislature – are elected through a single vote cast for a party. It can be combined with other electoral systems; in Uruguay DSV is used to elect the president and members of the Senate and Chamber of Representatives, with the presidential election also using the two-round system; if no party/presidential candidate receives a majority of the vote, a second round is held for the presidential election.^[1]

The initial republican constitutions of several countries in the Commonwealth of Nations, such as Kenya,^[2] Guyana^[3] and Zambia,^[4] provided for presidential elections by double simultaneous vote. Occasionally, as in Tanganyika,^[5][6] a variant was used whereby the candidate who won a plurality of constituencies (as opposed to a plurality of votes) would be elected. Such systems have also been used in Latin America.^{[citation needed]}

Use

Country	First election		Second election		Third election		Simultaneous votes
	Offices	System	Offices	System	Offices	System
Angola	Members of the National Assembly	Party-list PR	President	FPTP			Closed list party vote + personal vote
Bolivia	President (first round)	TRS	Chamber of Deputies	AMS	Senate	Party-list PR	Personal vote + mixed single vote + closed list party vote
Guyana	Members of the National Assembly	Party-list PR	President	FPTP			Closed list party vote + personal vote
Uruguay	President (first round)	TRS	Chamber of Representatives	Party-list PR	Chamber of Senators	Party-list PR	Personal vote + 2x closed list party vote

Notes