The chief pretrial services officer in districts in which pretrial services are established under
section 3152(b) of this title is authorized, subject to the general policy established by the Director and the approval of the district court, to procure temporary and intermittent services to the extent authorized by
section 3109 of title 5, United States Code. The staff, other than clerical staff, may be drawn from law school students, graduate students, or such other available personnel.