On February 7, 2013, the EPA promulgated the final Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Commercial and Industrial Solid Waste Incineration (CISWI) Units. The EPA granted reconsideration on a select few issues, and the final reconsideration was published on June 23, 2016. The Clean Air Act (CAA) directs states with existing CISWI units subject to the emission guidelines to submit plans to the EPA that implement and enforce the emission guidelines. The emission guidelines contain model rule language that states can use for implementation. If a state with existing CISWI unit does not submit an approvable plan within 2 years after promulgation of the emission guidelines, the CAA requires the EPA to develop, implement and enforce a federal plan for CISWI units in the state. This action proposes the CISWI federal plan, which will consist of the model rule language presented in the emission guidelines.