First instance body dealing with electoral disputes

Article 68

From the date offorming the Executive Board until two days after the announcement of theelection results, Executive Boards of the center of election districts arerequired to accept any submitted complaints.   They are toattend to these complaints in a joint meeting of the Executive and SupervisoryBoards of the election district within a maximum of seven days from the date ofreceiving them.

Clause 1.  Thosewho have a complaint against the [overall] manner in which the elections wereconducted may submit their documented complaint to the secretariat of theGuardian Council within seven days of the election.

Source: ElectionsAct of Islamic Consultative Assembly (law enacted on 28/11/2009)

http://www.princeton.edu/irandataportal/elections/lawparl/

GuardianCouncil and Executive Election Board are two EMBs that are in charge ofelections in Iran.