Oregon Revised Statutes Public Officers and Employees § 242.570

(1) Whenever there is a vacancy in any position in the classified civil service, the school board, or its designated representative, immediately shall notify the civil service board thereof.

(2) The civil service board thereupon shall certify to the appointing authority the names and addresses of the three eligible candidates standing highest upon the register for the class or grade to which such position belongs. If there are fewer than three, the board shall certify all remaining candidates upon the register. When vacancies exist in two or more positions of the same class in the same department at the same time, the board may certify a smaller number than three candidates for each position, but those certified must be eligible candidates standing highest upon the register.

(3) The board may, by rule, limit the number of times the same candidate is certified to the appointing authorities.

(4) The appointing authority may require the candidates certified to come before the appointing authority for interview. When the candidates are applicants for beginning employment, the appointing authority shall be entitled to inspect their examination papers.