A bill to amend section 21 of the Act of February 25, 1920, commonly known as the Mineral Leasing Act.

Amends the Mineral Leasing Act to revise the authority of the Secretary of the Interior to lease lands containing oil shale deposits. Permits such leases to exceed 5,120 acres of land if necessary to permit long-term commercial operations.

Revises guidelines pertaining to the number of leases which may be issued to any one person, association, or corporation.

Authorizes holders of oil shale leases to acquire additional leases for purposes, other than the removal of mineral deposits, connected with the development of an oil shale operation.

Establishes guidelines for other lease provisions including environmental considerations, rent, and duration.