28 CFR 527.48: Transfer of American national prisoners from foreign countries.

The Bureau of Prisons is responsible for:

(a) Sending escorts to foreign countries to retrieve American national prisoners who have been approved for transfer to the United States and who have had their consent verified at the consent verification hearing specified in 18 U.S.C. 4108; and

(b) Making logistical arrangements for the transfer and coordinating with the United States Parole Commission for proceedings to determine how the sentence will be administered.