The Environmental Protection Agency (EPA) is taking final action to approve revisions to the State Implementation Plan (SIP) submitted on November 29, 2021, by the State of Missouri. This final action approves revisions to a state regulation related to the Cross- State Air Pollution Rule SO<INF>2</INF> Group 1 Trading Program. The revisions alter the amounts of CSAPR SO<INF>2</INF> Group 1 emission allowances that are allocated to two of the state's units from the state's annual emissions budgets.

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving portions of the State Implementation Plan (SIP) revisions submitted to the EPA by the State of Texas (the State) for the 2008 8-hour ozone National Ambient Air Quality Standard (NAAQS). The SIP revisions being approved describe how CAA requirements for vehicle Inspection and Maintenance (I/M) are met in the Dallas-Fort Worth (DFW) and Houston-Galveston-Brazoria (HGB) Serious ozone nonattainment areas.

The Environmental Protection Agency (EPA) is proposing to approve the regional haze state implementation plan (SIP) revision submitted by the State of Maryland on February 8, 2022, as satisfying applicable requirements under the Clean Air Act (CAA) and EPA's Regional Haze Rule for the program's second implementation period.

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving portions of three revisions to the Texas State Implementation Plan (SIP) submitted by the Texas Commission on Environmental Quality (TCEQ) on July 9, 2021, and January 21, 2022, that update the air permitting program by removing obsolete provisions and enhancing public notice requirements of the air permitting program. We are also making ministerial edits to correct several errors identified in the amendatory language for the Texas SIP.