Amends GS 143-215.107A to only require motor vehicle emissions inspections to be performed in Mecklenburg County. (Currently, Alamance, Buncombe, Cabarrus, Cumberland, Davidson, Durham, Forsyth, Franklin, Gaston, Guilford, Iredell, Johnston, Lincoln, Mecklenburg, New Hanover, Randolph, Rowan, Union, and Wake Counties.)

Requires the Department of Environmental Quality (DEQ), by December 31, 2023, to prepare and submit to the United States Environmental Protection Agency (EPA) for approval by that agency a proposed North Carolina State Implementation Plan amendment based on the change to the motor vehicle emissions testing program provided in the act.

Effective the later of January 1, 2024, or the first day of a month that is 60 days after the Secretary of DEQ certifies to the Revisor of Statutes that the EPA has approved an amendment to the North Carolina State Implementation Plan submitted as detailed above. Provides for procedures for the Secretary to notify the public and others of the effective date of the act.