(a) Pursuant to this section, the person in charge of a public place may designate an area for the use of smokers. Notwithstanding the foregoing, a smoking area may not be designated and no person may smoke in any of the following unless the area is enclosed and well ventilated:

(1) Child care facilities.

(2) Hospitals, health care clinics, doctors' offices, physical therapy facilities, and dentists' offices.

(3) Elevators.

(4) Buses, taxicabs, and other means of public conveyance.

(5) Government buildings, except private offices.

(6) Restrooms.

(7) Service lines.

(8) Public areas of aquariums, galleries, libraries, and museums.

(9) Lobbies, hallways, and other common areas in apartment buildings, senior citizen residences, nursing homes, and other multiple-unit residential facilities.

(10) Polling places.

(11) Schools or other school facilities or enclosed school sponsored events for grades K-12.

(12) Retail establishments, excluding restaurants, except areas in retail establishments not open to the public.

(13) Lobbies, hallways, and other common areas in multiple-unit commercial facilities.

(b) If a smoking area is designated, existing physical barriers and ventilation systems shall be used to minimize the toxic effect of smoke, and no more than one-fourth of the total square footage in any public place within a single enclosed area shall be reserved and designated for smokers unless clientele dictates otherwise. No area designated as a smoking area shall contain common facilities which are expected to be used by the public.

(c) Nothing in this section shall be construed to prevent any owner, operator, manager, or other person who controls any establishment or facility from declaring and enforcing a nonsmoking policy in the entire establishment or facility.

(d) Notwithstanding any other provision of this section or this chapter, if any restaurant is deemed by its owner as being too small to have a designated smoking area, it shall be left up to the discretion of the owner if the facility will be a "smoking" or a "nonsmoking" facility.