(a) Any person owning or operating a place of business in which cigarettes, tobacco products, or tobacco related objects are sold or offered for sale shall post in a conspicuous place a sign which shall contain the following statement:

"SALE OF CIGARETTES, TOBACCO, TOBACCO PRODUCTS, OR TOBACCO RELATED OBJECTS TO PERSONS UNDER 18 YEARS OF AGE IS PROHIBITED BY LAW."

Such sign shall be printed in letters of at least one-half inch in height.

(b) Any person who fails to comply with the requirements of subsection (a) of this Code section shall be guilty of a misdemeanor.