My Dept has a FASTeam and we do have qualifications. One of the main ones being 3 years of interior experience. Add that to FF I, Survival and FAST, as well as in-house yearly requirements on just interior or specialize rescue ops. We allow the younger members to train with us but not respond, this allows them to be more ready when they reach 3 years. the other problem is that 3 years may not produce experience bit for that matter you may never get someone with a lot of experience if your fires are down.