No manufacturer may sell vehicles subject to emission standards without prior certification from EPA.

Emission Standards

Regulations that set the maximum amount of pollutants that can be released into the environment by vehicles and industrial plants.

Prior Certification

The process of obtaining a formal verification or validation of certain qualifications or standards before engaging in specific activities.

EPA

Environmental Protection Agency, a U.S. federal government agency responsible for protecting human health and the environment by writing and enforcing regulations.