Section 26.01.37.150 - EQUIPMENT01.Sound Level Meter. A type one (1) sound level meter, which generally can provide the most accurate measurements, must be used for certification of exhaust systems and for law enforcement purposes.02.Tachometer. A hand-held tachometer of the type described in Subsection 010.11 must be used if the OHV does not have a permanently affixed tachometer.03.Calibrator. A calibrator appropriate for use with the sound level meter must be used to calibrate the sound level meter.04.Manual. Persons measuring sound levels for law enforcement purposes must use the "Off-Highway Motorcycle and ATV Stationary Sound Test Manual," published by the Motorcycle Industry Council, Inc. for current information concerning manufacturer's specifications for OHV operation.Idaho Admin. Code r. 26.01.37.150