What protections are afforded a river identified for study under Section 5(d)(1) of the Wild & Scenic Rivers Act and for how long?

A river identified for study under Section 5(d)(1) is protected by each agency’s policy; i.e., the Wild & Scenic Rivers Act provides no statutory protections. To the extent of each agency’s authority, the river’s free-flowing condition, water quality, outstandingly remarkable values, and classification are protected. Prior to a suitability study, the inventoried classification is protected. If, as the result of a suitability study, a less restrictive classification is recommended for a river or portion thereof, the agency is obligated to protect this recommended classification.

Source
Interagency Wild & Scenic Rivers Council