To be operated as an air ambulance, an aircraft, whether a fixed- or rotary-wing type, must comply with all Federal Aviation Administration rules as they pertain to maintenance inspections, flight and duty time, contained in 14 C.F.R Part 135, entitled "Operating Requirements: Commuter and On Demand Operations and Rules Governing Persons On Board Such Aircraft."
Nev. Admin. Code § 450B.562
NRS 450B.120, 450B.130