Portions of the Town of Tusten also lie within the congressionally designated Upper Delaware Scenic and Recreational River Corridor, which is delineated in Appendix C.[2] This area, which encompasses the Scenic Overlay District noted above, is defined by the National Park Service River Management Boundary in the Final River Management Plan: Upper Delaware Scenic and Recreational River, 1986. This boundary extends through the Scenic River, General Residential, Downtown Business, Roadside Business, Rural Residential, and Recreational River Districts beginning from the edge of the Delaware River and extending 0.5 to 0.75 miles into each of the aforementioned zoning districts. Areas within the boundary must conform to the standards established by Final River Management Plan: Upper Delaware Scenic and Recreational River, 1986.