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Staff Publications

Vehicle Tailpipe Emissions Standards

Subject
Transportation & Motor Vehicles
Published
11/20/2018

This memorandum discusses tailpipe vehicle emission standards in the United States and the current regulations for light-duty vehicles. 

The Colorado Senate and House of Representatives will not convene on Monday, January 20, 2025 in observance of Dr. Martin Luther King Jr. day.

The effective date for bills enacted without a safety clause is August 6, 2025, if the General Assembly adjourns sine die on May 7, 2025 (unless otherwise specified). Details