Code of Federal Regulations Title 43. Public Lands:  Interior § 43.2531.3 Effect of application

(a) Where an allotment application under the fourth section of the Act of February 8, 1887, as amended, 25 U.S.C. 334 (is not accompanied by the requisite certificate from the Bureau of Indian Affairs showing the applicant to be eligible for an allotment, and the applicant is given time to furnish such certificate, the application does not segregate the land, and other applications therefor may be received and held to await final action on the allotment application.

(b) Where an allotment application is approved by the authorized officer, it operates as a segregation of the land, and subsequent application for the same land will be rejected.