"Potential to emit" means the maximum capacity of a stationary source to emit a regulated air pollutant under its physical and operational design. Any physical or operational limitation on the capacity of a stationary source to emit a regulated air pollutant, including equipment for the control of air pollution and any restrictions on the hours of operation of the stationary source or on the type or amount of material combusted, stored or processed, may be treated as part of its design for the purposes of determining its potential to emit if the limitation is federally enforceable.
Nev. Admin. Code § 445B.138
NRS 445B.210