On October 2nd the IOC will elect the host city for the 2016 Olympic Games.
Each city will give final presentations to the voting International Olympic Committee members. The drawn order of the presentations is Chicago, Tokyo, Rio and Madrid. Each city will have 70 minutes including a period for questions and answers.
After the presentations, the Evaluation Commission will review their report with the IOC members.
Voting will commence a 5:10 PM local time in Copenhagen - it will be by secret electronic balloting.
Any city requires 50% +1 votes to win a ballot. If no city receives enough votes to win, the bid with the least amount of votes is dropped from the ballot and the remaining cities are added to a new ballot. There could be as many as three ballots.
There are currently 106 IOC members. Members representing countries with a bid city on the ballot may not vote. There are two members from the United States, two from Japan, two from Brazil and one from Spain. These members may vote in subsequent ballots if their city is eliminated.
There is one suspended member who may not vote and the IOC President Jacques Rogge will not vote. In total, there are 97 eligible votes on the first ballot. This number may be reduced if any voters are excused.
If there is a tie vote on he final ballot - the IOC President can cast a tie-breaking vote.
After each ballot the IOC President will announce either that a winner has been declared or he will name the city that is eliminated from the next ballot. After the final ballot, the name of the winning city is sealed until the annoucement ceremony at 6:30 PM local time.
After the announcement, the host city contract signing will folllow at 7:30 PM.