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Attainment not later than December 31,2007; Post-attainment demonstration and plan updates as outlined in Section E; o In the absence of achieving milestones, including attaining the 8-hour ozone standard on or before December 31,2007, the area will be deemed in violation of the Compact and will be subject to the full planning requirements under applicable Clean Air Act (CL\A) standard SIP processes including requirements defined as part of the EP A's 8- hour implementation rulemaking. Such an area will be subject to the same requirements and deadlines which would have been effective under the CAA and the EPA's 8-hour designation rulemaking had it not participated in this program, with no preferential delays or exemptions from the EP A. However, the area will receive appropriate credit in the standard SIP process for all emission reductions fi'om measures implemented in this program. o If the area has had the effective date of its nonattainment designation deferred and the area does not reach attainment of the standard by December 31,2007, then the nonattainment designation will be effective immediately. If the EPA's implementation schedule also requires SIP's from areas on or before December 31,2007, then a SIP revision demonstrating attainment by the new attainment date will be due for the nonattainment area no later than December 31,2008. The EP A will offer areas no extensions or delays of the applicable attainment date. B. Emissions Inventory o Modeling emissions inventories using the most current tools available will be completed for at least one recent episode in order to support the early action plan. Emission inventories must include: 1999 or later episode reflective of a typical ozone season exceedance that meets the EP A episode selection guidance to ensure that representative meteorological regimes are considered; MOBILE6 data with link based Travel Demand Model (TDM) mobile data in urban areas; NONROAD model data adjusted for local equipment populations and usage rates; Area source databased when possible on local survey data. o Further episode inventories will also be developed over time to fully represent the variety of situations that typically contribute to ozone production in the area and to include the most recent developments. o Emission inventories will be compared and analyzed for trends in emission sources over time. This will improve an area's understanding of the trends in emissions in their community and will aid in verification of the accuracy of the inventories. C. Modeling o Emission inventories will be used to develop SIP quality modeling episodes that perform withi.'1 the EPA's accepted margi.'1 of accuracy, including a base case ,md future case on or before December 31, 2007. Therefore, inventories must sufficiently account for