Every person, firm or corporation who solicits any advertisement to be published in any law-enforcement officers' association's official magazine, yearbook, or other official publication, shall disclose to the person so solicited, whether so requested or not, the name of the law-enforcement association for which such advertisement is solicited, together with written authority from the president or secretary of such association to solicit such advertising on its behalf.
Any person, firm or corporation violating the provisions of this section shall be guilty of a Class 2 misdemeanor.