"Smoke" means a stream of visible emissions of exhaust from a vehicle.
Nev. Admin. Code § 445B.449
Environmental Comm'n & Dep't of Motor Veh. Reg. § 1.31, eff. 1-10-78; renumbered as § 1.33, 12-20-79-NAC A 11-19-85, eff. 1-1-86; 11-23-87, eff. 1-1-88-Substituted in revision for NAC 445.883