When is a river formally classified?

Congress may classify the river upon the date of designation or authorize classification by the managing agency.  In the latter case, managing agencies have one year to finalize the boundary, identify the appropriate classification, and publish a notice in the Federal Register.  The agency has three years to complete a management plan.  For Section 2(a)(ii) rivers, classification would be established when the Secretary of the Interior designates the river.

Interagency Wild & Scenic Rivers Council