StacksVerified U.S. regulatory reference

43 CFR §3509.40

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
They are prospecting permits and leases for parcels where the United States holds less than 100 per cent of the mineral interest of the parcel. Fractional interest leases allow development of the shared mineral interests.