Where a textile fiber product is not in the form intended for sale, delivery to, or for use by the ultimate consumer, an invoice or other document may be used in lieu of a label, and such invoice or other document shall show, in addition to the name and address of the person issuing the invoice or other document, the fiber content of such product as provided in the Act and regulations as well as any other required information.
16 C.F.R. §303.31