16 C.F.R. § 323.1
Definitions
As used in this part:
(a) The term Made in the United States means any unqualified representation, express or implied, that a product or service, or a specified component thereof, is of U.S. origin, including, but not limited to, a representation that such product or service is “made,” “manufactured,” “built,” “produced,” “created,” or “crafted” in the United States or in America, or any other unqualified U.S.-origin claim.
(b) The terms mail order catalog and mail order promotional material mean any materials, used in the direct sale or direct offering for sale of any product or service, that are disseminated in print or by electronic means, and that solicit the purchase of such product or service by mail, telephone, electronic mail, or some other method without examining the actual product purchased.