Special Forces warrant officer candidates from both the active and national guard components attend the Special Forces Warrant Officer Technical and Tactical Certification Course (SFWOTTC) at the Special Forces Warrant Officer Institute, John F. Kennedy Special Warfare Center and School, Fort Bragg, North Carolina. The course includes both WOCS and WOBC, tailored to the unique training and experience of the Special Forces Sergeant. Candidates must be a staff sergeant (E-6, "NATO: OR-6") and above, and have served three years on an operational detachment.