The proprietor or other person in charge of the premises of a public place shall post or cause to be posted in a conspicuous place signs clearly stating that smoking is prohibited by state law. The person in charge of the premises shall also post or cause to be posted in any designated smoking area, signs stating that smoking is permitted in such room or area. The proprietor or person in charge of the public place shall have the authority to establish the percentage of area in the public place which shall be posted and designated as a smoking area. (Prior code § 7-303)