In recognition of the past use of the Scenic Area by Indian people for traditional cultural and religious purposes, the Secretary shall insure nonexclusive access to Scenic Area lands by Indian people for such traditional cultural and religious purposes, including the harvest of the brine fly larvae. Such direction shall be consistent with the purpose and intent of the American Indian Religious Freedom Act of August 11, 1978 (92 Stat. 469) [42 U.S.C. 1996, 1996a]. As a part of the plan prepared pursuant to section 543c(c) of this title, the Secretary shall, in consultation with appropriate Indian tribes, define the past cultural and religious uses of the Scenic Area by Indians.