parties, shall conduct a study to improve nonmotorized recreation trail opportunities (including mountain bicycling) on land not designated as wilderness within the Santa Barbara, Ojai, and Mt. Pinos ranger districts. 211. Use by members of Indian Tribes (a) Access The Secretary shall ensure that Indian Tribes have access, in accordance with the Wilderness Act ( 16 U.S.C. 1131 et seq. ), to the wilderness areas, scenic areas, and potential wilderness areas designated by this title for traditional cultural and religious purposes. (b) Temporary closures (1) In general In carrying out this section, the Secretary, on request of an Indian Tribe, may temporarily close to the general public 1 or more specific portions of a wilderness area, scenic area, or potential wilderness area designated by this title to protect the privacy of the members of the Indian Tribe in the conduct of traditional cultural and religious activities. (2) Requirement Any closure under paragraph (1) shall be— (A) made in such a manner as to affect the smallest practicable area for the minimum period of time necessary for the activity to be carried out