§ 442-c. Violations by salesmen; broker's responsibility. No violation of a provision of this article by a real estate salesman or employee of a real estate broker shall be deemed to be cause for the revocation or suspension of the license of the broker, unless it shall appear that the broker had actual knowledge of such violation or retains the benefits, profits or proceeds of a transaction wrongfully negotiated by his salesman or employee after notice of the salesman's or employee's misconduct. A broker shall be guilty of a misdemeanor for having any salesman associated with his firm who has not secured the required license authorizing such employment.