My department has a Cessna 172, and we "share" a Bell OH 58 (Jet Ranger) with other local agencys and FHP. FHP provides the pilot, the observers are provided on a volunteer basis. Our Cessna is currently being flown by Naval Avaitors and a deputy from the next agency over who has a commercial license. To fly any aircraft "for hire" or as your primary job assignment requires a commercial license. The pilot of the helo is a retired Navy commander with a gazillion hours, now a Lt. with Highway Patrol. Our first pilot for the Cessna was a retired Marine Col. with 4 gazillion hours. Being here by Pensacola, we have a very large pool of experienced and retired avaitors. The biggest problem is getting someone to go through rookie school so they can be certified by the state. Esentially, each department will have different criteria. The base line is a commercial license, required by the FAA.