Person generally includes all categories of entities covered under 1 U.S.C. 1, including but not limited to the following: a railroad; any manager, supervisor, official, or other employee or agent of a railroad; any owner, manufacturer, lessor, or lessee of railroad equipment, track, or facilities; any independent contractor providing goods or services to a railroad; and any employee of such owner, manufacturer, lessor, lessee, or independent contractor; however, person, when used to describe an entity that FRA alleges to have committed a violation of the provisions of law formerly contained in the Hazardous Materials Transportation Act or contained in the Hazardous Materials Regulations, has the same meaning as in 49 U.S.C. 5102 (formerly codified at 49 App. U.S.C. 1802(11)), i.e., an individual, firm, copartnership, corporation, company, association, joint-stock association, including any trustee, receiver, assignee, or similar representative thereof, or government, Indian tribe, or authority of a government or tribe when offering hazardous material for transportation in commerce or transporting hazardous material to further a commercial enterprise, but such term does not include the United States Postal Service or, for the purposes of 49 U.S.C. 51235124 (formerly contained in sections 110 and 111 of the Hazardous Materials Transportation Act and formerly codified at 49 App. U.S.C. 18091810), a department, agency, or instrumentality of the Federal Government.