Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving portions of a revision to the Texas State Implementation Plan (SIP) submitted by the Texas Commission on Environmental Quality (TCEQ) on July 9, 2021. The revision includes updates to the Texas Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR) permitting programs to incorporate Federal New Source Review (NSR) regulations for Project Emissions Accounting (PEA).