; and (B) the Secretary of the Interior (acting through the Director of the Bureau of Land Management), with respect to land managed by the Bureau of Land Management or other Federal land. (21) Temporary cessation The term temporary cessation means a halt in mine related production activities for a continuous period of not longer than 5 years. (22) Undue degradation The term undue degradation means substantial irreparable harm to significant scientific, cultural, or environmental resources on public land. I Locatable mineral deposits 101. Limitation on patents (a) Determinations required No patent shall be issued by the United States for any mining claim, millsite, or tunnel site located under the general mining laws unless the Secretary determines that— (1) a patent application was filed with the Secretary with respect to the claim not later than September 30, 1994