An individual assigned to the IRR typically receives no pay and is not obligated to drill, conduct annual training, or participate in any military activities (except for periodic Muster activities) until activated by Presidential Reserve Callup Authority or until electing to drill, train, or serve in a "Drill without Pay" or an "Active Duty" role. Unlike members of the Standby Reserve (active and inactive) and Retired Reserve, IRR personnel are members of the Ready Reserve and as such, they retain their status as uniformed military personnel, their military specialty (i.e., pilot, Surface Warfare Officer, infantryman, intelligence officer or enlisted intelligence specialist, etc.) and rank/pay grade. IRR personnel also receive benefits similar to other members of the Reserve Components of