Idaho Code § 44-601: Unlawful to counterfeit union label.

Whenever any person, or any association or union of workingmen, has heretofore adopted or used, or shall hereafter adopt or use, any label, term, design, device or form of advertisement, other than a trademark or a service mark, for the purpose of designating, making known, or distinguishing any goods, wares, merchandise, or other products of labor, as having been made, manufactured, produced, prepared, packed or put on sale, by such person, or association, or union of workingmen, or by a member or members of such association or union, it shall be unlawful to counterfeit or imitate such label, term, design, device or form of advertisement, or to use, sell, offer for sale, or in any way utter or circulate any counterfeit or imitation of any such label, term, design, device or form of advertisement.