State Implementation Plan (SIP) Summaries
State Implementation Plan (SIP) Summaries
From time to time a state may include as part of its SIP a commitment to perform a future action, such as develop a new control measure or revise an emission inventory. Provided that this commitment has been formally adopted as part of the SIP and approved by EPA, it then becomes federally enforceable. The state will then be held to this commitment and associated schedules.