Indonesian General Election Commission (KPU) told political parties to register their presidential candidates and vice presidential candidates for the July 8 presidential election by May 17, a KPU official said here on Tuesday.

The KPU said presidential candidate registration should be conducted from May 10, one day after the commission scheduled to announce final result of the legislative elections on May 9, and last for seven days.

"Presidential candidates should be filed in by political parties. After the registration, KPU will undertake verification process over the eligibility of the candidates," the KPU Chairman Abdul Hafiz Anshari told a press conference here on Tuesday.

The press conference was attended by KPU officials, Election Supervisory Body (Bawaslu) Chairman Nurhidayat Sardini and representative of political parties.

Anshari said that along with the registration process, the candidates must undertake health check process in hospitals authorized by the KPU.

According to the Law No. 42/2008 that regulates the presidential election, political parties eligible to nominate its presidential candidate must occupy at least 20 percent of seats in the parliament, or equals to 112 seats of a total of 560.

The outdoor campaign period for the presidential election will commence in June 12 and end on July 4. Candidates will be given chances to have debate sessions against their opponents five times in nationwide televised programs during that period.

KPU said that it would allocate 800 ballot papers to each polling station, comparing with only 500 in the legislative elections, and take another up to 2 percent papers as reserve.

More than 171 million voters nationwide were listed in the KPU' s official voter list. KPU set up more than 527,000 polling stations across the country in the legislative elections.

Meanwhile, Bawaslu Chairman Nurhidayat Sardini said that it would engage its members in the region and districts to supervise the KPU's efforts to correct its voter list so as to make sure that eligible voters have their rights to vote.

The second round presidential election will be held on September 8, if no eligible candidate singled out as the winner in the election on July 8.

Indonesia's new president will be sworn in before the incumbent president ends up his presidency service tenure on October 20.