Section 20.04.01.080 - SPARK ARRESTERS01.Requirements. The steam or internal combustion engines referred to in Section 38-121, Idaho Code, must be equipped with properly installed, maintained, and effectively working spark arresters that comply with the standards set forth in the San Dimas Technology and Development Center's "Spark Arrester Guide(s)."02.Exemptions. The following are exempt from the requirements of the rule:a. Turbo-charged internal combustion engines in which one hundred percent (100%) of the exhaust gases pass through the turbo-charger.b. Engines of passenger-carrying vehicles and light trucks, equipped with baffle-type muffler and tailpipe through which all exhaust gasses pass, that are kept in good repair.c. Engines of heavy-duty trucks equipped with a vertical exhaust stack and muffler extending above the cab of the vehicle.d. Engines of water pumping equipment used in firefighting.e. Engines of helicopters and other aircraft.Idaho Admin. Code r. 20.04.01.080