CFR›Title 43›Subtitle B›Chapter II›Part 3500›Subpart 3515 ContainsSubject groups Lease Exchange Procedures–Types of Lease ExchangesCorpusDaily eCFRDisplayed edition2026-05-22Last updated2026-05-22 Subpart 3515—Mineral Lease Exchanges Subject Groups Lease Exchange Procedures Lease Exchange Procedures Sections 3515.23–3515.27 Lease Exchange Requirements Lease Exchange Requirements Sections 3515.10–3515.18 Types of Lease Exchanges Types of Lease Exchanges Sections 3515.20–3515.22 Previous 3514 Subpart 3514—Lease Relinquishments and Cancellations Next 3516 Subpart 3516—Use Permits