It is awarded to members of the U.S. Air Force and Air Force Reserve, and to members of other services after Aug. 1, 1960, for sustained individual combat or mission readiness or preparedness for direct weapon-system employment. Specifically, a service member must meet the following criteria: complete an aggregate 24 months of sustained professional performance as a member of U.S. Air Force combat or mission-ready units subject to combat readiness reporting; or be individually certified as combat or mission ready and have maintained individual readiness the entire period according to a major headquarters; or subject to an individual positional evaluation program according to a higher headquarters standard. The term Combat Ready is defined as being professionally and technically qualified in an aircraft crew position in an aircraft that can be used in combat.