The bill, known as the "Foreign Emissions and Nonattainment Clarification for Economic Stability Act" or "FENCES Act," amends the Clean Air Act to address emissions originating from outside the United States. It provides clarifications on which emissions are covered and outlines the designation process for nonattainment areas. Additionally, it introduces a new section regarding the applicability of sanctions and fees in nonattainment areas, specifying circumstances where certain sanctions or fees shall not apply if the state demonstrates that emissions from outside the area are beyond their control. This bill aims to address the impact of foreign-originating emissions on nonattainment areas within the United States and the associated regulatory measures.