After allowing non-oil exporters to sell their foreign currency at “negotiated rates” earlier in the week, the Central Bank of Iran extended the move to other forex sellers.  
In a bylaw to official exchange bureaus on Thursday, the regulator let retail and institutional currency holders to offer currency at negotiated rates. 
According to the bylaw published by IRNA, authorized moneychangers must “uphold money laundering rules when purchasing currency in banknotes.” How this can and should be done was not clear.  
In line with moves to control volatility in the currency market, the central bank is struggling to boost supply the demand for which never ceases.