For the purposes of an inspection conducted pursuant to NAC 445B.7015, the emission control system of a motor vehicle that is used by the Department to conduct the inspection will be altered in such a manner that an approved inspector, using due care and following the testing procedures described in NAC 445B.580, 445B.5805 and 445B.589, would readily identify, through only a visual inspection of the vehicle, that the emission control system of the vehicle has been tampered with or is missing or inoperable.
Nev. Admin. Code § 445B.7025
NRS 445B.790