19 C.F.R. § 111.5 Representation before Government agencies.
Title 19 - Customs Duties
(a) Agencies within the Treasury Department. A broker who represents a client in the importation or exportation of merchandise may represent the client before the Treasury Department or any representative of the Treasury Department on any matter concerning that merchandise. (b) Agencies not within the Treasury Department. In order to represent a client before any agency not within the Treasury Department, a broker must comply with any regulations of that agency governing the appearance of representatives before it.
Title 19: Customs Duties
PART 111—CUSTOMS BROKERS
Subpart A—General Provisions
§ 111.5 Representation before Government agencies.