The U.S. Environmental Protection Agency (EPA), after reviewing the above-referenced shipment or entry has determined that the Importer has violated the American Innovation and Manufacturing Act (AIM Act) and the regulations promulgated thereunder and recommends that the U.S. Customs and Border Protection (CBP) deny entry of the items in the shipment containing hydrofluorocarbons (HFCs). This letter provides a summary of the applicable law and details EPAs determination and recommendation.