Azerbaijan, Baku, Jun.12/ Trend F.Karimov/
The Central Bank of Iran has banned transferring foreign currency from the mainland to free zones, the Donya-ye Eqtesad Persian language daily reported.
"Offering foreign currency to companies which are active in free zones, is not permitted," the report said.
However, the Central Bank has not banned transferring foreign currency from free zones to the mainland.
The decision has been made in line with boosting management of foreign currency reserves and preventing from the outflow of foreign currency assets.
The International Monetary Fund put Iran's forex reserves at $101 billion in 2011. It predicted that the figure would fall to $89 billion in 2012, and to $84 billion in 2013.
In November 2012, the intelligent unit of The Economist predicted that the figure will be below $70 billion.
Iran says it holds $100 billion in foreign currency overseas, but sanctions have made transfer of the money into the country impossible.