Revises provisions relating to the testing of emissions from motor vehicles. (BDR 40-661)

SB 230 changes emissions testing requirements for vehicles in Clark and Washoe Counties (population over 100,000). It revises existing law to require biennial (every two years) emissions testing for most vehicles after their fourth registration, instead of annual testing. This directly affects vehicle owners in those counties who would previously have needed annual inspections after their fourth registration. The bill updates regulatory language to mandate this biennial testing cycle while distinguishing between light-duty and heavy-duty vehicles.