(a) An attempt to export from the United States any defense articles in violation of the provisions of this subchapter constitutes an offense punishable under section 401 of title 22 of the United States Code. Whenever it is known or there is probable cause to believe that any defense article is intended to be or is being or has been exported or removed from the United States in violation of law, such article and any vessel, vehicle or aircraft involved in such attempt is subject to seizure, forfeiture and disposition as provided in section 401 of title 22 of the United States Code.

(b) Similarly, an attempt to violate any of the conditions under which a temporary export or temporary import license was issued pursuant to this subchapter or to violate the requirements of § 123.2 of this subchapter also constitutes an offense punishable under section 401 of title 22 of the United States Code, and such article, together with any vessel, vehicle or aircraft involved in any such attempt is subject to seizure, forfeiture, and disposition as provided in section 401 of title 22 of the United States Code.