Upon condemnation of such firearm, jack, light, vehicle, or device, any and all persons before such court, pursuant to the provisions of sections 4505 and 4506 of this title, shall be liable to pay the costs of the condemnation proceedings, if, in the judgment of such court, any of them by themselves, clerks, servants, or agents, shall have been engaged in, aided in, assisted in or abetted in the unlawful use of such firearm, jack, light, vehicle, or device in violation of the provisions hereof, or have been privy thereto, or have knowingly permitted the use of the same by them owned or controlled, for such unlawful purposes. (Added 1961, No. 119, § 1, eff. May 9, 1961.)