15 C.F.R. § 280.205
A respondent individual may appear and participate in person, a corporation by a duly authorized officer or employee, and a partnership by a partner. If a respondent is represented by counsel, counsel shall be a member in good standing of the bar of any State, Commonwealth or Territory of the United States, or of the District of Columbia, or be licensed to practice law in the country in which counsel resides if not the United States. A respondent personally, or through counsel or other representative who has the power of attorney to represent the respondent, shall file a notice of appearance with the administrative law judge. The Department will be represented by the Office of Chief Counsel for Export Administration, U.S. Department of Commerce.
15 C.F.R. § 280.205