are typically not eligible for promotion/advancement. Individual Ready Reserve (IRR) Comprises members who no longer train with combat ready Reserve units, but are qualified in their fields and eligible to be recalled in the event of a national emergency. There is a small group labeled as Participating IRR (PIRR) who receive points toward military retirement, but not drill pay or Annual Training with pay and are under what the Air Force Reserve (and Air National Guard) designates as Category E (CAT E) status. Some PIRR members continue to participate with existing Air Force organizations in a non-pay status or in Unified Combatant Commands where they may be eligible to perform Active Duty for Training (ADT), Active Duty for Operational Support (ADOS), Active Duty Special Work (ADSW) ... also known as "mandays" ... or voluntary Mobilization to Active Duty (MOB) with full pay and allowances. CAT E Air Force Reservists also include some 1,000 USAF Academy Liaison Officers (ALOs), Civil Air Patrol Reserve Liaison Officers (RLOs), chaplains, and a few other positions that require military duty, but not a fixed schedule. These CAT E personnel can also earn active duty mandays with pay just like CAT A and B reservists, but on a more limited basis. Retired Reserve The Retired Reserve is made up of retired personnel who receive pay after retiring from Active Duty or a Reserve Component, or are Reservists awaiting retirement pay at age 60. Some exceptions are made for certain Reservists mobilized to Active Duty since 11 September 2001 who may receive retirement pay earlier on a sliding scale between ages 50 and 60. Eligibility for TRICARE Prime or TRICARE Standard medical coverage for retirees and their families is delayed until the retiree reaches age 60. Associate Program A USAF Associate Unit is a unit where active duty, Air Force Reserve and Air National Guard members combine forces and missions using "Total Force" concept integration. The Air Force Reserve Command Associate Program provides trained crews and maintenance personnel for active-duty owned aircraft. This unique program pairs a Reserve unit with an active-duty unit to share a single set of aircraft and rests on the idea that there are more operational requirements than there are manpower to fulfill them. The Associate Reserve program is based on providing manpower to complement the Total Force. Previously, an associate unit was one where the active duty (typically a wing level organization)