(a) The following acreage will not be included in computing acreage limitations:

1. (1) Acreage under any lease any portion of which is committed to any federally approved oil and gas agreement;
2. (2) Acreage under any lease for which royalty (including compensatory royalty or royalty in-kind) was paid in the preceding calendar year; and
3. (3) Acreage under leases subject to an operating, drilling or development contract approved by the Secretary, as provided in 43 CFR 3105.30.