|Iran Supreme Leader Ayatollah Khamenei|
The four-day registration process will be followed by committee deliberations to decide which candidates fulfil the necessary requirements and ideological criteria for the May 19 election.
Report says a final list of candidates may take weeks to appear.
The approved candidates would then launch their nationwide election campaigns on May 11.
Observers expect a three-way race between reformist candidate President Hassan Rowhani, conservative cleric Ebrahim Raisi, and hardliner, Hamid Baghaei.
The other candidates that have yet to be known stand only a slim chance.
Over 55 million Iranians aged 18 or older are eligible to vote in the election. (dpa/NAN)
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