Section 97.904 - Applicability(a) Each of the units in Texas listed in the table in § 97.911(a)(1) shall be a Texas SO2 Trading Program unit, and each source that includes one or more such units shall be a Texas SO2 Trading Program source, subject to the requirements of this subpart. 82 FR 48364 , Oct. 17, 2017, as amended at 85 FR 49215 , Aug. 12, 2020 82 FR 48364 , 11/16/2017; 85 FR 49215 , 9/11/2020