(1) Any person who, either as director, officer, or agent of any firm or corporation or as agent of any person violating the provisions of this article, assists or aids, directly or indirectly, in such violation shall be responsible equally with the person, firm, or corporation for which he acts.
(2) In the prosecution of any person as officer, director, or agent, it shall be sufficient to allege and prove the unlawful intent of the person, firm, or corporation for which he acts.