Provided, however, that any zoning ordinance in which a community sets forth standards or requirements for the location, design, construction, or maintenance of on-site wastewater treatment systems shall first be submitted to the director of the department of environmental management for approval as to the technical merits of the ordinance. In addition, any zoning ordinance in which a municipality sets forth standards regarding wetland requirements, shall first be submitted to the director of the department of environmental management for approval as to the technical merits of the ordinance.
R.I. Gen. Laws § 45-24-30