Property shall not be initially designated or included into the Parks and Conservation District while it is privately owned, without the written consent of the owner to such inclusion first having been obtained. Lands of the federal, state, county or any local government, or of any subdivision, agency, authority or instrumentality thereof, shall not be subject to this limitation and may be so included by a duly adopted amendment to this chapter at any time such designation or inclusion appears warranted or appropriate. This section shall not be deemed to require the rezoning of any Parks and Conservation District property because of a change in the ownership or ownership status thereof, subsequent to such designation or inclusion.

Only buildings and structures customarily related to the permitted uses, such as parking lots, clubhouses, tennis courts, pools, bathhouses, restrooms, administration and maintenance buildings, gift shops, docks, bulkheads, access walkways, viewing platforms and the like shall be erected in the Parks and Conservation District. Where the use is a cultural or historic facility, such as a museum or interpretive center, the use shall be allowed only if it relates directly to the historic or natural character of the land on which it is situated and serves to educate the public about the same.

All such buildings and structures shall be of the minimum practical size. The method of sewage disposal and water supply shall also be approved by the Suffolk County Department of Health.