25 C.F.R. § 304.1 Penalties for imitation or unauthorized use.
Title 25 - Indians
The use of Government trade-marks in an unauthorized manner, or the colorable imitation of such marks, is subject to the criminal penalties imposed by section 5 of the said act (49 Stat. 892; 25 U.S.C. 305d).
Title 25: Indians
PART 304—NAVAJO, PUEBLO, AND HOPI SILVER, USE OF GOVERNMENT MARK
§ 304.1 Penalties for imitation or unauthorized use.