(a) Any person who shall knowingly violate any provision of sections 52 or 59 of this title, or (b) any person licensed under this chapter who, for the purposes of or in connection with any transaction or shipment in commerce, shall knowingly classify cotton improperly, or shall knowingly falsify or forge any certificate of classification, or shall accept money or other consideration, either directly or indirectly, for any neglect or improper performance of duty as such licensee, or (c) any person who shall knowingly influence improperly or attempt to influence improperly any person licensed under this chapter in the performance of his duties as such licensee relating to any transaction or shipment in commerce, or (d) any person who shall forcibly assault, resist, impede, or interfere with or influence improperly or attempt to influence improperly any person employed under this chapter in the performance of his duties, shall, upon conviction thereof, be deemed guilty of a misdemeanor and shall be fined not exceeding $1,000, or imprisoned not exceeding six months, or both, in the discretion of the court.