There are now fifteen UOTCs and two Officer Training Regiments (OTRs) throughout the United Kingdom, each of which serves the universities and Army Reserve units in a distinct geographic area. Those serving larger areas may have several detachments. Each UOTC is effectively an independent regiment, with its own cap badge, its own stable belt, and its own customs and traditions. UOTC members are classed as officer cadets (OCdt), despite the majority not having passed officer selection, and are members of the Army Reserve, paid when on duty. They are not classed as trained ranks and cannot be mobilised for active service. Officer cadets can gain appointments as a Junior Under Officer (JUO), a Company Under Officer (CUO), or a Senior Under Officer (SUO) and, like civilians, can also apply to the Army Officer Selection Board (AOSB), which, if they pass, leads to the opportunity to attempt the Army Reserve Commissioning Course with the goal of a commission as a second lieutenant. Officer cadets have no obligation to join the armed forces when they leave university and can resign from the UOTC at any time. UOTCs are led by officers and non-commissioned officers from the Regular Army and Army Reserve.