 The rank of flight officer was re-instituted by the United States Air Force's civilian Auxiliary, the Civil Air Patrol (CAP), in the mid-1980s, replacing the former ranks of warrant officer and chief warrant officer, new entrants for which had been eliminated by the Air Force in 1959 and discontinued with the retirement of the last USAF chief warrant officer in the Air Force Reserve in 1992.CAP Officers between the ages of 18 and 20 are eligible for promotion to the ranks of flight officer, technical flight officer and senior flight officer.Requirements for promotion to each grade is generally the same as for promotion to CAP second lieutenant, first lieutenant, and captain, respectively, and those flight officers who choose to enter the commissioned ranks are promoted to these respective ranks when they reach the age of 21.