CFR›Title 43›Subtitle B›Chapter II›Part 3920›Subpart 3927›43 CFR 3927.20 Citation43 CFR 3927.20CorpusDaily eCFRDisplayed edition2026-08-12Last updated2026-08-12 § 3927.20 Lease size.The maximum size of an oil shale lease is 5,760 acres. Previous 3927.10 § 3927.10 Lease form. Next 3927.30 § 3927.30 Lease duration and notification requirement.