Section 8
SEC. 8. Every dispensator of opium shall keep and maintain on the outside of his place of business, so that, the same may be seen and easily read by the public, a sign setting forth in plain, large letters the name or firm designation and the words "Licensed opium dispensary of the ''first,' 'second,' or 'third' class" as the case may be. For a failure to keep and maintain such sign conspicuously displayed as herein provided, or for a violation of any of the provisions of this Act, the Collector of Internal Revenue, or his duly authorized representative, may cancel the license issued to such of opium, and such dispensator of opium shall not be initiated to the return of any money paid by him for such license.