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The United States Army's Warrant Officer Candidate School (WOCS), located at Fort Rucker, Alabama, provides training for Soldiers to become a warrant officer in the U.S. Army or U.S. Army National Guard (also conducted via state Regional Training Institutes—RTI programs), with the recent exception of U.S. Army Special Forces Warrant Officers. Since 2007, Special Forces Warrant Officers attend the Special Forces Warrant Officer Technical and Tactical Certification Course (SF-WOTTC) at Fort Bragg, North Carolina. , WOCS and SF-WOTTC are the only two training institutions which are authorized to appoint warrant officers in the U.S. Army. Warrant officer candidates are typically drawn from enlisted members (up to Command Sergeant Major) and inter-service transfers. In this case, Inter-Service Transfer refers to enlisted members of the U.S. Air Force, U.S. Coast Guard, U.S. Navy, or U.S. Marine Corps transferring to the U.S. Army to attend WOCS, or civilian high school graduates who enlist for guaranteed attendance as aviation (flight) candidates at WOCS after they complete Basic Combat Training (BCT). Warrant officer candidates without prior enlisted service are informally referred to as "high school to flight school" or "street to seat" recruits by warrant officer candidates with prior enlisted service.