; (2) in subsection (c), by striking by the amendments made by section 10(b) of this Act and inserting within the recreation area ; and (3) by adding at the end the following: (d) Study; report (1) In general Not later than 5 years after the date of enactment of this subsection, the Secretary shall conduct a study of the area depicted on the map entitled Proposed Additions to the Smith River National Recreation Area and dated January 23, 2023, that includes inventories and assessments of streams, fens, wetlands, lakes, other water features, and associated land, plants (including Port-Orford-cedar), animals, fungi, algae, and other values, and unstable and potentially unstable aquatic habitat areas in the study area. (2) Modification of management plans; report On completion of the study under paragraph (1), the Secretary shall— (A) modify any applicable management plan to fully protect the inventoried values under the study, including to implement additional standards and guidelines