Overlay zoning districts

Overlay zoning districts are hereby established to regulate areas and structures of historical significance, educational and health care institutions, and mixed uses. These regulations are necessary to meet the purposes set forth in section 100 of this ordinance. The boundaries of the overlay zoning districts are as defined in section 102 of this ordinance. These boundaries may be amended in accordance with article IX of this ordinance. Overlay zoning districts are designed to impose supplementary requirements and do not in any manner reduce any requirements of the underlying zone, except where specifically provided for by this ordinance.