No building shall be erected, altered or used and no lot or premises shall be used except for use as offices of the following professions:

Where required by the laws of the State of New York to be licensed or certified to practice, said license or certification should be a further condition to the permitted uses heretofore listed in Subsection A.

Off-street parking. It is specifically provided that Article XXXI, Comprehensive Off-Street Parking and Loading Regulations, shall be applicable in this district not only with uses hereafter erected, enlarged, created or extended, as provided in said Article XXXI, but also upon the initial use of any property in this district.

Height. The height of any building or structure shall not exceed 35 feet and within such limits shall be that best suited to the architectural design and arrangements of all the buildings.

Building area. The total coverage for buildings and structures shall not exceed 50% of the plot area. The remaining area of the plot area shall be used for the accessory parking of vehicles, loading and unloading spaces and buffer planting area. Except for parking areas, driveways and sidewalks, as approved on the site plan hereinafter provided, all other areas shall be lawn and landscaped areas. Required plantings shall be properly trimmed and maintained throughout the continuance of the use on the lot, as a condition of the certificate of occupancy.

Sewage disposal. All proposed buildings not provided with municipal sewage disposal facilities shall be equipped with an independent sewage disposal plant approved by the Nassau County Department of Health.