Section 52.485 - Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of sulfur dioxide?(a) The owner and operator of each SO2 source located within the District of Columbia and for which requirements are set forth under the Federal CAIR SO2 Trading Program in subparts AAA through III of part 97 of this chapter must comply with such applicable requirements. The obligation to comply with these requirements in part 97 of this chapter will be eliminated by the promulgation of an approval by the Administrator of a revision to the District of Columbia State Implementation Plan as meeting the requirements of CAIR for PM2.5 relating to SO2 under § 51.124 of this chapter, except to the extent the Administrator's approval is partial or conditional or unless such approval is under § 51.124(r) of this chapter.(b) Notwithstanding any provisions of paragraph (a) of this section and subparts AAA through III of part 97 of this chapter and any State's SIP to the contrary: (1) With regard to any control period that begins after December 31, 2014,(i) The provisions of paragraph (a) of this section relating to SO2 emissions shall not be applicable; and(ii) The Administrator will not carry out any of the functions set forth for the Administrator in subparts AAA through III of part 97 of this chapter; and(2) The Administrator will not deduct for excess emissions any CAIR SO2 allowances allocated for 2015 or any year thereafter. 72 FR 62345 , Nov. 2, 2007, as amended at 76 FR 48362 , Aug. 8, 2011; 79 FR 71671 , Dec. 3, 2014