The title of this article shall be "Private Schools."

As used in this article, the following terms shall have the meanings indicated:

CLASSROOM AREA - That area within a building, totally enclosed from the elements, used only for instructional purposes, and shall exclude corridors, hallways, cloakrooms, closets, lavatories, kitchens, dining rooms or dining areas, administrative and clerical office space, stairwells and stairs, landings, verandas, patios, tents, platforms and other accessory buildings. No areas otherwise conforming to the provisions of this definition shall be computed as "classroom area" unless serviced by a permanent heating system installed and maintained in conformity with all applicable statutes, ordinances or codes.

OUTDOOR ACTIVITY AREA - That area of the premises exclusive of buildings and accessory structures and excluding the areas lying within the setback requirements hereinafter referred to, devoted exclusively to outdoor play and activities.

SCHOOL - All schools other than public, devoted to academic instruction of any grade level through and including the elementary level and shall include private nursery schools, private kindergarten schools, private elementary schools and private academies, but shall not include institutions for the instruction of mentally retarded children.

No premises shall hereafter be utilized for a school in any use district provided for in this ordinance unless the premises are a minimum of acre in area and have a street frontage of at least 100 feet; provided, however, that this section shall not apply to premises wherein a school was conducted on the effective date of this ordinance.

The building area of any premises hereafter used for a school shall not exceed 30% of the total lot area, exclusive of accessory structures; provided, however, that this section shall not apply to premises wherein a school was conducted on the effective date of this ordinance.

A. In any use district, no building, swimming pool, wading pool, swing, seesaw or other play yard equipment shall be erected or maintained within 25 feet of the front yard line of the premises.

B. In any use district, no building may be erected closer to the side and rear yard lines of the premises than is permitted by the provisions of this ordinance applicable to that use district.

C. In any use district, no swimming pool, wading pool, swing, seesaw or other play yard equipment shall be erected or maintained within five feet of the side and rear yard lines of premises less than 12,000 square feet in area; provided, however, that if the premises are 12,000 square feet or more, the setback requirements referred to in this subsection shall be 10 feet.

The total number of students permitted on premises utilized as a school at any one time shall not exceed:

A. One student per 30 square feet of classroom area; and

B. One student per 200 square feet of cleared outdoor activity area.