Colorado · Colorado Revised Statutes — Title 42, Vehicles and Traffic
C.R.S. Title 42 § 42-4-406: Requirement of certification of emissions control for registration - testing for diesel smoke opacity compliance
What this law says, in plain English
Diesel vehicles in certain areas must obtain emissions control certification within specified timeframes based on vehicle age and type to be registered or reregistered. Certification requires testing for smoke opacity compliance.
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