Robert Seldon Lady, the former Milan CIA station chief, was sentenced by an Italian appeals court in Milan earlier this year in the extraordinary rendition case to nine years in prison after being tried in absentia in Italy for the kidnapping of the Muslim cleric.
The trials of Lady, who has since retired from the CIA, and two other Americans in the case brought the first convictions anywhere in the world against agents involved in the agency's extraordinary rendition programme, a practice alleged to have led to torture.
The terror suspect, Osama Moustafa Hassan Nasr, also known as Abu Omar, was abducted in February 2003, transferred to US military bases, first in Italy, then in Germany, before being flown to Egypt.
The cleric alleged he was tortured in Egypt. He was later released.
The previous Italian government had said that extradition could only be sought for Lady, since it can only be requested for people who have been sentenced to more than four years in prison.