S.C. Code Regs. § § 61-62.H.96.70
The owners and operators, and to the extent applicable, the NOX authorized account representative of a NOX Budget unit, shall implement a monitoring and reporting system necessary to attribute ozone season NOX mass emissions to each unit in accordance with 40 CFR part 75, Subpart H ("Part 75"), except that a NOX budget unit that (i) is not required by 40 CFR 51.121, Regulation 61-62.97, or other regulation to comply with Part 75 and (ii) is subject to Subpart D or Subpart Db of 40 CFR Part 60, may instead monitor and report NOX mass emissions in accordance with 40 CFR Part 60, Subpart D or Subpart Db, as applicable. NOX mass emissions measurements recorded and reported in accordance with the above shall be used to determine compliance with the NOX budgets set forth in Section 96.40 of this regulation. For purposes of a source subject to the monitoring and reporting provisions of Part 75, the definitions in Section 96.2 and in 40 CFR Part 72 Section 72.2 shall apply, and the terms affected unit, designated representative, and continuous emission monitoring system (or CEMS) in 40 CFR Part 75 shall be replaced by the terms NOX Budget unit, NOX authorized account representative, and continuous emission monitoring system (or CEMS), respectively, as defined in Section 96.2.
S.C. Code Regs. § 61-62.H.96.70