JAKARTA - INDONESIA holds presidential elections on Wednesday, the outcome of which will determine the pace of reform in Southeast Asia's largest economy.

Three candidates are running in the election: incumbent President Susilo Bambang Yudhoyono, current Vice President Jusuf Kalla and former president Megawati Sukarnoputri.

Here are some facts and figures about the election: - If no single candidate wins more than 50 per cent of the vote, or 20 per cent of the vote in 17 provinces, there will be a run-off on September 8.

- The General Election Commission, or KPU, said 176,395,015 out of Indonesia's population of 232 million are registered to vote in the presidential election, up from 171,265,442 in the April legislative elections.

Voters were added to the electoral roll following complaints that lists for the legislative elections were incomplete. Both Ms Megawati's and Mr Kalla's teams have complained that they have not yet received a detailed version of the updated voter list.

- For the first time, the KPU arranged for the presidential candidates to hold debates, broadcast live on television.

While the debates were polite and relatively light on policy, the fact that they were held at all is a sign of a maturing democracy in Indonesia.

- Voting will take place across 33 provinces in a vast archipelago of over 17,000 islands. There are 451,182 polling stations, each equipped with at least two voting booths.

- Polling stations will be open from 7am to noon. Because of time differences across the archipelago, the first polling stations to open will be in Papua, the easternmost part of Indonesia, while the last to close will be the western part of Indonesia, including the capital Jakarta.

- A private polling company, the Indonesia Survey Institute (LSI) will broadcast quick count results live on local television stations Trans TV and Trans7 from noon until 4pm on July 8.

Metro TV will publish the quick count result, along with the percentage of votes in each province, later in the day. The KPU will announce the official result between July 25-27, according to its website. -- REUTERS