Section, Pub. L. 88–526, § 2(c), (d), Aug. 31, 1964, 78 Stat. 710, permitted the entering into of contracts for collective prospecting, development or operation of coalfields by lessees for the purpose of conserving natural resources.

Statutory Notes and Related Subsidiaries
Savings Provision

Pub. L. 94–377, § 5(a), Aug. 4, 1976, 90 Stat. 1086, provided that the repeal of this section is subject to valid existing rights.