Backgrounder: Key facts about Argentina's presidential election

Argentines voted on Sunday in a presidential run-off election between the center-right opposition leader Mauricio Macri and Daneil Scioli, the hand-picked successor to outgoing President Cristina Fernandez.

The following are the basic facts about the Sunday presidential election.

A total of 32,037,323 Argentineans are eligible to vote in the presidential election and the winner will succeed Fernandez from Dec. 10, 2015.

The top two candidates entering the run-off were Scioli, of Justicialist Party, and Macri, of Cambiemos, who have garnered 37.08 percent and 34.15 percent, respectively, during the first round of voting, held on Oct. 25.

The district with the largest number of voters, and consequently the most important for the election is the province of Buenos Aires. With its 10,822,005 voters, it represents 37.3 percent of the total electorate.

Polling stations will open from 8 am local time to 6 pm local time. A total of 100,000 men from the army and police have been deployed to ensure the elections proceed smoothly.

A total of 5,000 vehicles, eight helicopters, two planes and seven boats have been deployed to help maintain peace during the ballot.

The country's 24 electoral districts will have 13,800 polling stations, with 94,979 voting booths available.

Around 40,000 postal workers will be tasked with taking the voting records from the polling stations to the processing centers.

A total of 30 mules belonging to the army and police will also be used to bring the votes back from remote and inhospitable territories.

In Argentine, voting is compulsory for all people aged between 18 and 70, but optional for those under 18 and over 70.

The law stipulates that any one who does not vote without prior notification, such as for health reasons or living more than 500 km away from a polling station, will receive a fine. Endit