"The court authorised Reuters to open its Tehran bureau," deputy culture minister Mohammad Jafar Mohammadzadeh told the ISNA news agency, without specifying when the decision was made.
"Last week the ministry told Reuters it could restart its work in Iran," he added.
In September 2012, a court found Reuters guilty of "propaganda against the regime", and "publishing false information in an effort to disturb public opinion" in a report portraying female ninja students as assassins.
The case stems from a Reuters video report on a group of female ninjas training in the martial art in the city of Karaj, west of Tehran. The original headline on the story erroneously read "Thousands of female Ninjas train as Iran's assassins".
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Reuters subsequently changed the headline to read "Three thousand women Ninjas train in Iran". It later removed the report.
Reuters global editor in chief, Stephen Adler, told The New York Times newspaper last March that the headline mistake was not malicious, and added: "I don't see factual errors in the story."
The authorities routinely monitor and restrict the activities of the few journalists working for foreign media in Iran.