No parking or loading shall be permitted in the front yard, although a dropoff or porte cochere shall be permitted in the front yard. All parking and loading areas and vehicular driveways shall be set back from side and rear property lines by a minimum of 25 feet. For museums and houses of worship, at least one space per four seats or one space per 350 square feet of gross floor area shall be provided, whichever is greater. For schools, one space per 20 students plus one space per two teachers or other staff shall be provided. All such parking shall be provided on site. No parking spaces on site shall be rented, leased or otherwise utilized for any uses other than those conducted on the premises. All loading and delivery areas shall be located in the rear yard and shall be effectively screened to a height to eight feet from all adjacent residential properties and the public street. One loading space 10 feet wide by 40 feet in length and with a minimum height clearance of 14 feet shall be provided. All parking and loading areas shall be paved with a hard, durable, dustless surface and shall be curbed. Parking spaces shall be a minimum of nine feet wide by 18 feet in depth, with driveways and parking aisles at least 24 feet in width. Parking shall be confined to designated parking spaces only. No structured or underground parking shall be permitted. All parking areas shall be landscaped with a minimum of one tree per 15 parking spaces.