The Environmental Protection Agency (EPA) is taking direct final action to amend the national emission standards for hazardous air pollutants for flame attenuation (FA) lines in the wool fiberglass manufacturing industry. This direct final rule provides affected sources a 1-year extension to comply with the emission limits for FA lines. The EPA can provide sources up to 3 years to comply with emission limits in the Clean Air Act (CAA) standards. FA lines initially were given 2 years to comply with the emission limits. This action will extend the compliance date to the maximum of 3 years while we conduct our review. This compliance date extension will enable the EPA to conduct a review of the emission limits for FA lines in light of recently submitted corrected source emissions data.