Released in December of 2020, the U.S. Environmental Protection Agency issued a new Tampering Policy that replaces Mobile Source Enforcement Memo 1A (1974) and addresses civil enforcement of the Clean Air Act's prohibitions on tampering and aftermarket defeat devices. The updated Policy reinforces the interpretation that in exercising its discretion the EPA will forego enforcement action when a company has a documented "reasonable basis" that a product will not adversely affect vehicle emissions when installed. Watch as a panel of industry experts and an EPA representative provide an overview of the new Policy.

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