Have California vehicle emissions standards changed?

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Have California vehicle emissions standards changed?

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In 1996, BAR adjusted some standards to increase their fairness. As a result, some standards are slightly more stringent than they were previously and some are slightly more lenient than before. Updated emissions standards categories were created for many of the newer cars; the new groupings take into consideration the dramatic changes in automotive technology which have occurred during the past 15 years. California’s emissions standards consider the model year, vehicle type, and gross vehicle weight. Older cars have looser standards than n ewer ones.No vehicle is ever held to a standard intended for a car which is newer or technologically more advanced, and allowance is made for normal wear and tear in a vehicle’s emissions control system as it ages. In fact, Smog Check failure rates for all vehicles have decreased since the new guidelines were implemented.

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