Its says $1 to $1.5 Billion USD/Month is being spent to reduce the amount of Iraqi Dinar within the Open Market Place. From the same NYT article it stated by the Head of the CBI that the Buy Back (which I put in BOLD TYPE states that this is the LEVER for controlling Consume Prices aka; Inflation
This is all part of the 'Tight Monetary Policy' mandated by the IMF/Government of Iraq/ and the CBI.
The LEVER is Self Evident from the New York Times: