For the purpose of, and when used in this act:
1. The term "disaster area" means the scene or location of a natural or military disaster, an explosion, an aircraft accident, a fire, a railroad accident and a major traffic accident.
2. The term "authorized person" shall include all state, county and municipal police and fire personnel; hospital and ambulance crews; National Guard and Emergency Management personnel ordered into the disaster area by proper authority; federal civil and military personnel on official business; persons who enter the disaster area to maintain or restore facilities for the provision of water, electricity, communications, or transportation to the public; and such other officials as have a valid reason to enter said disaster area.