28 C.F.R. § 0.112
The Director, United States Marshals Service, is authorized to deputize the following persons to perform the functions of a Deputy U.S. Marshal in any district designated by the Director:
(d) Other persons designated by the Associate Attorney General pursuant to 28 CFR 0.19(a)(3).
All such deputations shall expire on a date certain which shall be stated on the face of the deputation.
[Order No. 1047-84, 49 FR 6485, Feb. 22, 1984, as amended at 61 FR 33657, June 28, 1996]