((a)) The Office of Personnel Management, subject to the rules prescribed by the President under this title for the administration of the competitive service, shall prescribe regulations for, control, supervise, and preserve the records of, examinations for the competitive service.
((b)) The Office shall prescribe and enforce regulations for the administration of the provisions of this title, and Executive orders issued in furtherance thereof, that implement the Congressional policy that preference shall be given to preference eligibles in certification for appointment, and in appointment, reinstatement, reemployment, and retention, in the competitive service in Executive agencies, permanent or temporary, and in the government of the District of Columbia.
((c)) The Office shall prescribe regulations for the administration of the provisions of this title that implement the Congressional policy that preference shall be given to preference eligibles in certification for appointment, and in appointment, reinstatement, reemployment, and retention, in the excepted service in Executive agencies, permanent or temporary, and in the government of the District of Columbia.
((d)) The Office may prescribe reasonable procedure and regulations for the administration of its functions under chapter 15 of this title.