(a) For purposes of meeting the emission inventory requirements of section 172(c)(3) of the Act for nonattainment areas, the State shall, no later than three years after designation:
(1) Submit to EPA Statewide emission inventories for direct PM2.5 emissions and emissions of PM2.5 precursors. For purposes of defining the data elements for these inventories, the PM2.5 and PM2.5 precursor-relevant data element requirements under subpart A of this part shall apply.
(2) Submit any additional emission inventory information needed to support an attainment demonstration and RFP plan ensuring expeditious attainment of the annual and 24-hour PM2.5 standards.
(b) For inventories required for submission under paragraph (a) of this section, a baseline emission inventory is required for the attainment demonstration required under Sec. 51.1007 and for meeting RFP requirements under Sec. 51.1009. As determined on the date of designation, the base year for this inventory shall be the most recent calendar year for which a complete inventory was required to be submitted to EPA pursuant to subpart A of this part. The baseline emission inventory for calendar year 2002 or other suitable year shall be used for attainment planning and RFP plans for areas initially designated nonattainment for the PM2.5 NAAQS in 2004-2005.