25 C.F.R. § 310.1
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 ), which provides:
Any person who shall counterfeit or colorably imitate any Government trade-mark used or devised by the Board as provided in section 305a of this chapter, or shall, except as authorized by the Board, affix any such Government trade-mark, or shall knowingly, willfully, and corruptly affix any reproduction, counterfeit, copy, or colorable imitation thereof upon any products, Indian or otherwise, or to any labels, signs, prints, packages, wrappers, or receptacles intended to be used upon or in connection with the sale of such products, or any person who shall knowingly make any false statement for the purpose of obtaining the use of any such Government trade-mark, shall be guilty of a misdemeanor, and upon conviction thereof shall be enjoined from further carrying on the act or acts complained of and shall be subject to a fine not exceeding $2,000 or imprisonment not exceeding six months or both such fine and imprisonment.
25 C.F.R. § 310.1