48 C.F.R. § 52.246-14
52.246-14 Inspection of Transportation.
As prescribed in 46.314, insert the following clause in solicitations and contracts for freight transportation services (including local drayage) by rail, motor (including bus), domestic freight forwarder, and domestic water carriers (including inland, coastwise, and intercoastal). The contracting officer shall not use the clause for the acquisition of transportation services by domestic or international air carriers or by international ocean carriers, or to freight services provided under bills of lading or to those negotiated for reduced rates under 49 U.S.C. 10721 or 13712. (See part 47, Transportation.)
The Government has the right to inspect and test the Contractor's services, facilities, and equipment at all reasonable times. The Contractor shall furnish Government representatives with the free access and reasonable facilities and assistance required to accomplish their inspections and tests.