Any person, firm, or corporation, whose permanent allegiance is due to the United States, violating any of the provisions of this chapter shall be deemed guilty of a misdemeanor and, upon conviction thereof, shall be punished by a fine of not less than $50 and not more than $100 or by imprisonment for not less than one month and not more than sixty days, or by both such fine and imprisonment, in the discretion of the court, and if the offense be continuing in its character, each week or part of a week during which it continues shall constitute a separate and distinct offense. And it shall be the duty of the consular and judicial officers of the United States in China to enforce the provisions of this chapter.