((a)) Whoever knowingly deposits for mailing or delivery, or knowingly causes to be delivered by mail according to the direction thereon, or at any place to which it is directed to be delivered by the person to whom it is addressed, any matter declared to be nonmailable by , shall be fined under this title or imprisoned not more than one year, or both.

((b)) Whoever knowingly deposits for mailing or delivery, causes to be delivered by mail, or causes to be delivered by any interstate mailing or delivery other than by the United States Postal Service, any matter declared to be nonmailable by , shall be fined under this title, imprisoned not more than one year, or both.