Order of selection from certificates.
CFR · 2024-01-01 · US · Title 5
An appointing officer, with sole regard to merit and fitness, shall select an eligible for: (a) The first vacancy from the highest three eligibles on the certificate who are available for appointment; and (b) The second and each succeding vacancy from the highest three eligibles on the certificate who are unselected and available for appointment.
official document · source cfr-2024 · id 5:§ 332.404