The Saltmarsh Conservation District shall be the area along the North River from the river itself to the upland edge of the marsh as defined and shown on the 1915 Plan of the North River Authorized by Chapter 112, Resolves of 1914, William F. Williams, Chief Engineer, a copy of which is on file in the office of the Town Clerk and is made a part hereof.
In the Saltmarsh Conservation District, no structure shall be erected except noncommercial docks, catwalks, piers, wharfs or floats, nor may any area within said zone be filled, drained, dredged or excavated, except by special permit.
A. 
The owner of any land located in this district, or his agent, may apply to the Board of Appeals for a special permit for the construction of any structure which would have been permitted on said land prior to the adoption of this article, or for filling, drainage, dredging or excavation.
B. 
No permit shall be granted which will adversely affect the natural character of the area in which the land referred to in the application is located.
C. 
No such permit shall be granted except after notice and hearing as is provided by law for the granting of variances. In addition, notice shall be given by registered mail to the Chair of the Conservation Commission or his designated representative.
D. 
The Conservation Commission shall file a report setting forth the opinion of the Conservation Commission as to whether or not the granting of a permit will be consistent with the natural character of the area and the aims and purposes of the Conservation Commission. If the Conservation Commission shall fail to file its report on or before the date set for the hearing on the permit, the Board of Appeals shall assume that the Conservation Commission has no objection to the granting of the permit, and the Conservation Commission shall have no standing to appear to be heard in any further proceedings relative to such permit.