Infrastructure, Rule, and Program SIPs
When EPA establishes a new National Ambient Air Quality Standard (NAAQS) or revises an existing NAAQS, the federal Clean Air Act requires Washington to develop an infrastructure State Implementation Plan (SIP). The infrastructure SIP demonstrates that Washington has the necessary legal authority, regulatory structure, and sufficient resources to implement the NAAQS statewide.
Washington usually submits rules (Washington Administrative Codes or WACs) along with a SIP as enforceable means to carry out the control strategy in any type of SIP. Sometimes, rules are even submitted as standalone SIP revisions. When EPA approves a rule as part of Washingtons SIP, the rule becomes federally-enforceable. That is, if Washington does not implement the rule, EPA or citizens can step in and enforce the rule at the federal level.
Some SIPs satisfy programs or parts of programs required by the Clean Air Act. The subjects addressed by these SIPs can be quite diverse. One example is the Motor Vehicle Inspection and Maintenance Program, more commonly known as the Emission Check Program. This program is required for carbon monoxide and ozone nonattainment areas. Other examples include the Washington State Visibility Protection Program and the 1998 Smoke Management Program.
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