Whenever a new or revised National Ambient Air Quality Standard (NAAQS) is promulgated, the Clean Air Act (CAA) requires states to submit a plan for the implementation, maintenance, and enforcement of the standard, commonly referred to as infrastructure requirements. The Environmental Protection Agency (EPA) is approving the Oregon Department of Environmental Quality's (ODEQ) State Implementation Plan (SIP), submitted on September 25, 2018, as meeting infrastructure requirements for the 2015 ozone NAAQS. In addition, the EPA is approving the addition of an Oregon Administrative Rule to the SIP, submitted as part of the Cleaner Air Oregon SIP submission on December 11, 2018. This rule identifies the November 2018 edition of the Code of Federal Regulations (CFR) as the CFR version referred to throughout the state's rule.