Code of Federal Regulations Title 43. Public Lands:  Interior § 43.2091.3–2 Opening

(a) If a proposal or an application described in § 2091.3–1 of this part is not denied, modified, or otherwise terminated prior to the end of the segregative periods set out in § 2091.3–1 of this part, the segregative effect of the proposal or application automatically terminates upon the occurrence of either of the following events, whichever occurs first:

(b) If the proposal or application described in § 2091.3–1 of this part is denied, modified, or otherwise terminated prior to the end of the segregation periods, the lands shall be opened promptly by publication in the Federal Register of an opening order specifying the date and time of opening.

(c) Subject to valid existing rights, non-Federal lands acquired through exchange by the United States shall be segregated automatically from appropriation under the public land laws and mineral laws for 90 days after acceptance of title by the United States, and the public land records shall be noted accordingly. Except to the extent otherwise provided by law, the lands shall be open to the operation of the public land laws and mineral laws at midnight 90 days after the day title was accepted unless otherwise segregated pursuant to part 2300 of this title. (See 43 CFR 2201.9(b))