Adoption and Submittal of State Plans for Designated Facilities — 40 CFR Part 60, Subparts B and Ba

Under Clean Air Act (CAA) section 111(d), EPA issues regulations directing states to submit plans to establish "standards of performance" for certain air pollutant emissions from existing facilities that are in source categories regulated under CAA section 111 (New Source Performance Standards). EPA accordingly develops emission guidelines (EGs) for existing sources that meet the section 111(d) criteria and has promulgated general provisions for the Emissions Guidelines state plan adoption and submittal processes.  

General provisions for the state plan processes under CAA 111(d) were first promulgated in 1975 as 40 CFR part 60 subpart B. The subpart B provisions included timelines for submission of state plans, EPA’s action on such submissions, and EPA’s promulgation of federal plans. In 2023, EPA issued final amendments to update these general provisions under 40 CFR 60 subpart Ba that apply to all Emissions Guidelines published after July 8, 2019.