Whenever a new or revised National Ambient Air Quality Standard is promulgated, the Clean Air Act requires states to submit plans for the implementation, maintenance, and enforcement of such standard, commonly referred to as infrastructure requirements. On October 25, 2018, the State of Alaska submitted such a plan for the ozone standard revised on October 1, 2015. In this action, the Environmental Protection Agency (EPA) is approving the Alaska plan as meeting applicable infrastructure requirements.