Cadets may apply for the Special Tactics Officer (STO) speciality during their junior year. Cadets should submit a Phase I package by 1 January of their junior year. Phase II Selection is conducted at Hurlburt Field, FL in March. Candidates must be prepared for a physically and mentally demanding week and to be competitive, cadets must perform well above the minimums. If not selected at Phase II, cadets can continue in the career field they were categorized for. Participation is limited to qualified AS300 and AS400 cadets that have completed field training.