![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
The NOx SIP Call
In October, 1998, EPA finalized the "Finding of Significant Contribution and Rulemaking for Certain States in the Ozone Transport Assessment Group Region for Purposes of Reducing Regional Transport of Ozone"-commonly called the "NOx SIP Call." The NOx SIP Call was designed to mitigate significant transport of NOx, one of the precursors of ozone. For those states opting to meet the obligations of the NOx SIP call through a cap and trade program, EPA included a model NOx Budget Trading Program rule (Part 96). This trading program was developed to facilitate cost effective emissions reductions of oxides of nitrogen (NOx) from large stationary sources. Part 96 provided sources with a complete trading program including provisions for applicability, allocations, monitoring, banking, penalties, trading protocols and program administration. States choosing to participate in the NOx Budget Trading Program had the flexibility to modify certain provisions within the model rule.
The entire rulemaking history of the NOx SIP Call can be found on the Regional Transport of Ozone (RTO) page of the Transfer Technology Network Web site, maintained by the Office of Air Quality Planning and Standards. Rulemaking documentation includes:
- the Notice of Proposed Rulemaking (November 1997)
- the Supplemental Notice of Proposed Rulemaking (May 1998)
- the Final Rule (October 1998)
- Related documents and data, including fact sheets and the RIA to the Final NOx SIP Call (October 1998)