Nev. Rev. Stat. § 484C.190
If:
2. A person who is certified pursuant to NRS 484C.620 examines the solution or gas, confirms the concentration of alcohol contained in the solution or gas, and makes an affidavit or declaration that identifies the concentration of alcohol contained in the solution or gas and states that the solution or gas has the chemical composition that is necessary for use in accurately calibrating, or verifying the calibration of, the device,
it is presumed that the solution or gas has been properly prepared and is suitable for use in calibrating, or verifying the calibration of, the device.
(Added to NRS by 1983, 1913; A 1987, 686; 1993, 2076; 1999, 2460; 2013, 289)—(Substituted in revision for NRS 484.3935)