For purposes of making appointments to vacancies in all positions in the Indian Health Service, a preference will be extended to persons of Indian descent who are:

(a) Members of any recognized Indian tribe now under Federal jurisdiction;

(b) Descendants of such members who were, on June 1, 1934, residing within the present boundaries of any Indian reservation;

(c) All others of one-half or more Indian blood of tribes indigenous to the United States;

(d) Eskimos and other aboriginal people of Alaska; or

(e) Until January 4, 1990, or until the Osage Tribe has formally organized, whichever comes first, a person of at least one-quarter degree Indian ancestry of the Osage Tribe of Indians, whose rolls were closed by an act of Congress.

(a) Preference will be afforded a person meeting any one of the definitions of § 136.41 whether the placement in the position involves initial appointment, reappointment, reinstatement, transfer, reassignment, promotion, or any other personnel action intended to fill a vacancy.

(b) Preference eligibles may be given a schedule A excepted appointment under 5 CFR 213.3116(b)(8). If the individuals are within reach on a Civil Service Register, they may be given a competitive appointment.

To be considered a preference eligible, the person must submit with the employment application a Bureau of Indian Affairs certification that the person is an Indian as defined by § 136.41 except that an employee of the Indian Health Service who has a certificate of preference eligibility on file in the Official Personnel Folder is not required to resubmit such proof but may instead include a statement on the application that proof of eligibility is on file in the Official Personnel Folder.