Section 97.910 - Texas SO[2] Trading Program budget, Supplemental Allowance Pool budget, and variability limit(a) The budgets for the Texas SO2 Trading Program and Supplemental Allowance Pool for the control periods in 2019 and thereafter are as follows: (1) The Texas SO2 Trading Program budget for the control period in 2019 and each future control period is 238,395 tons.(2) The Texas SO2 Trading Program Supplemental Allowance Pool budget for the control period in 2019 and each future control period is 10,000 tons.(b) The variability limit for the Texas SO2 Trading Program budget for the control periods in 2021 and thereafter is 16,688 tons.(c) The Texas SO2 Trading Program budget in paragraph (a)(1) of this section does not include any tons in the Supplemental Allowance Pool budget in paragraph (a)(2) of this section or the variability limit in paragraph (b) of this section. 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