"Crisis" means a traumatic and sudden event or emergency condition that:
1. Involves violence;
2. Profoundly and negatively affects or will affect pupils or employees of a public school, or both;
3. Occurs on the property of a public school, at an activity sponsored by a public school or on a school bus while the bus is engaged in its official duties for a public school; and
4. May involve serious injury or death.
(Added to NRS by 2001, 1323) — (Substituted in revision for NRS 392.604)