Code of Federal Regulations Title 43. Public Lands:  Interior § 43.2091.2–1 Segregation

(a) The Recreation and Public Purposes Act, as amended (43 U.S.C. 869–4), for a period of 18 months (See part 2740 and subpart 2912);

(b) The sales provisions of section 203 of the Federal Land Policy and Management Act of 1976 (43 U.S.C. 1713) for a period of 270 days (See part 2710). The sales provisions of section 43 CFR 2711.1–2(d) provide for a segregation period, not to exceed two years unless, on a case-by-case basis, the BLM State Director determines that the extension is necessary and documents, in writing, why the extension is needed. Such an extension will not be renewable and cannot be extended beyond the additional two years.