S.J.Res. 31 became law 106 days after introduction, with cosponsors, all Republicans

This joint resolution removes the requirements for sources of persistent and bioaccumulative hazardous air pollutants to comply with certain major source emissions standards when those sources reclassify as area sources (which have less stringent standards). Specifically, the joint resolution nullifies the Environmental Protection Agency rule titled Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act . The rule requires sources that seek to reclassify as area sources to implement certain control methods (e.g., continue to employ emission control methods required under the major sources requirements) to ensure they do not increase emissions beyond the major source requirements applicable at the time of reclassification.