The U.S. Environmental Protection Agency (EPA) has published a rule approving a revised version of the Texas permitting program for major air pollution sources under the Clean Air Act’s (CAA’s) new source review (NSR) program. 77 Fed. Reg. 65,119 (10/25/12). The rule provides flexibility to major sources, such as power plants and chemical manufacturers, by establishing site-wide emissions caps known as plant-wide applicability limits (PALs) for existing pollution sources. PALs require continuous air monitoring for individual emissions sources within a plant so that the facility as a whole does not violate its state-issued permit. The rule also approves changes to the state implementation plan (SIP) and the 1997 eight-hour ozone national ambient air quality standards (NAAQS). EPA also approved revisions governing anti‑backsliding of major NSR SIP requirements for the one-hour ozone standards in areas that are in nonattainment for eight-hour ozone.