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).
source: The provisions of this part 304 contained in regulations governing use of Government mark on Navajo, Pueblo, and Hopi silver, April 2, 1937, unless otherwise noted.
cite as: 25 CFR 304.1