40 CFR § 97.101
Purpose
June 9, 2020
This subpart and subparts BB through II set forth the general provisions and the designated representative, permitting, allowance, monitoring, and opt-in provisions for the Federal Clean Air Interstate Rule (CAIR) NOX Annual Trading Program, under section 110 of the Clean Air Act and §52.35 of this chapter, as a means of mitigating interstate transport of fine particulates and nitrogen oxides.