25 CFR 700.45 - Business.
The term business means any lawful activity, except a nonprofit organization or a farm operation, that is -
(a) Conducted primarily for the purchase, sale, lease and or rental of personal and/or real property, and/or for the manufacture, processing, and/or marketing of products, commodities, and/or any other personal property; or
(b) Conducted primarily for the sale of services to the public; or
(c) Solely for the purpose of subpart D of this part, conducted primarily for outdoor advertising display purposes, when the display(s) must be moved as a result of the Act.