7 CFR §800.115

1. (a)General. Any interested person may request original inspection and weighing services. The kinds of inspection and weighing services are described in § 800.75.
2. (b)Class Y weighing services. A request for Class Y weighing services at an export elevator at an export port location shall cover all lots shipped or received in a specific type of carrier. At all other elevators, the request shall cover all lots shipped from or to a specific location in a specific type of carrier. Each request shall be for a contract period of at least 3 months, but a facility may, upon satisfactory notification, exempt specific unit trains from the request.
3. (c)Contract services. Any interested person may enter into a contract with an agency or the Service whereby the agency or Service will provide original services for a specified period and the applicant will pay a specified fee.