Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3101.2–3 Excepted acreage

(1) Acreage under any lease any portion of which is committed to any Federally approved unit or cooperative plan or communitization agreement;

(2) Acreage under any lease for which royalty (including compensatory royalty or royalty in-kind) was paid in the preceding calendar year;  and

(3) Acreage under leases subject to an operating, drilling or development contract approved by the Secretary.