Section 52.2312 - Requirements for the control of SO[2] emissions to address in full or in part requirements related to BART, reasonable progress, and interstate visibility transport(a) The Texas SO2 Trading Program provisions set forth in subpart FFFFF of part 97 of this chapter constitute the Federal Implementation Plan provisions fully addressing Texas' obligations with respect to best available retrofit technology under section 169A of the Act and the deficiencies associated with EPA's disapprovals in § 52.2304(d) and partially addressing Texas' obligations with respect to reasonable progress under section 169A of the Act, as those obligations relate to emissions of sulfur dioxide (SO2) from electric generating units (EGUs).(b) The provisions of subpart FFFFF of part 97 of this chapter apply to sources in Texas but not sources in Indian country located within the borders of Texas, with regard to emissions in 2019 and each subsequent year. 82 FR 48363 , Oct. 17, 2017