18 U.S.C. § 3604
Transportation of a probationer
A court, after imposing a sentence of probation, may direct a United States marshal to furnish the probationer with—
(a)
transportation to the place to which he is required to proceed as a condition of his probation; and
(b)
money, not to exceed such amount as the Attorney General may prescribe, for subsistence expenses while traveling to his destination.
(Added Pub. L. 98–473, title II, § 212(a)(2) , Oct. 12, 1984 , 98 Stat. 2002 .)