Muster calls reservists to 'half-day' duty Published July 23, 2008 DENVER -- The Air Reserve Personnel Center will conduct a muster for nearly 200 Individual Ready Reservists on July 25 from 9 a.m. to 1 p.m. at the Air Reserve Personnel Center here. The IRR Muster Program, mandated by Title 10 United States Code Section 12319, exists to enhance readiness and ensure the Air Force can "reach out and touch" the IRR population when called upon to do so. IRRs are primarily Air Force members who have served on active duty but still have a military service obligation to the Air Force. In war and other times of crisis, it is sometimes necessary to call up IRR members. To ensure the call up works when needed, ARPC coordinates annual musters at locations across the country including 25 active-duty, Reserve and Guard locations in 2008. Because of significant volunteerism, the Air Force Reserve has not had to mobilize the IRR since Operation Desert Storm in 1991. "Musters like this one provide the overall structure to gather and maintain contact and physical condition information of IRR Airmen, which will increase efficiency in the event an activation or mobilization becomes necessary," said Brig. Gen. Eric W. Crabtree, ARPC Commander. "Please understand, this is not a mobilization; it is simply a muster." Annually, for a maximum of four hours, IRRs are told to report to an Air Force base, within 150 miles of their residence. Upon arrival, information on their records is updated, they receive a basic medical screening and several briefings on entitlements and benefits of being in the IRR. Finally, the IRRs are paid for their time and are free to leave.