(1) Definition. A public building shall be construed to mean any theater, show-house, public hall, public meeting place, public transportation terminal, or any other public building not covered by specific regulations: Provided, That a public building shall not be construed to include any store, market, supermarket, or other commercial establishment open to the general public for commercial purposes which does not cater to an audience.

(2) Lighting and ventilation. All public buildings shall be properly lighted and ventilated according to the type of said building and the uses to which it is put.

(3) Water supply.

(a) Any public place supplied with water under pressure shall be equipped with sanitary drinking fountains of an approved type.

(b) Where water supplied for drinking is not obtained from a public water supply, such water shall be of a quality approved by the secretary of the department of health. When not under pressure, drinking water shall be stored in a covered container of an approved type.

(c) The use of the common drinking cup is prohibited.

(4) Toilet facilities. Every public building shall be provided with adequate sanitary toilet facilities for each of the sexes; and such facilities shall be convenient and accessible. Every public building which must provide adequate sanitary toilet facilities shall provide at least one free sanitary toilet facility for each of the sexes. Where toilet facilities are voluntarily provided by any store, market, supermarket, or other commercial establishment for use by customers of such establishment or the general public, there shall be at least one free sanitary toilet facility provided for each of the sexes. It shall be the duty of the owner, manager, or other responsible person in charge to see that the toilet system is properly installed and maintained in a usable and sanitary condition at all times.

The method of sewage disposal for all public buildings shall comply with the rules and regulations of the state board of health.

(5) Cleaning. All public buildings shall be kept at all times in a clean and sanitary condition and the cleaning shall be carried on under proper sanitary conditions. All rooms used for public meetings shall be cleaned after each meeting held in them, such cleaning to consist of thorough sweeping of the floors and wiping of the woodwork, together with proper airing of the rooms. No room shall be swept without the use of a proper dust-laying substance. Dry dusting is prohibited. In construing this regulation all meetings held during the course of a single day shall be regarded as one meeting.