Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3430.5–4 Lease exchange

(1) The lands under application have been shown to contain commercial quantities of coal;

(2) All or a portion of the proposed lease has been assessed as lands which should be unavailable for coal development because of land use or resource conflicts or as lands which are unsuitable for coal mining under the provisions of subpart 3461 of this title;  and

(3) The lands are exempted from the application of any relevant unsuitability criteria or the Secretary lacks the authority to prevent damage to or loss of the land use or resource values threatened by lease operations.