Section 52.56 - Control strategy: Ozone(a) The state implementation plan (SIP) revision submitted on June 21, 2022, addressing Clean Air Act section 110(a)(2)(D)(i)(I) (prongs 1 and 2) for the 2015 ozone national ambient air quality standards (NAAQS) is disapproved. 88 FR 9381 , Feb. 13, 2023