The EPA is approving a revision to the Albuquerque/Bernalillo County, New Mexico State Implementation Plan (SIP) to address the "good neighbor" provisions of the Clean Air Act (CAA) section 110(a)(2)(D)(i), for the 1997 ozone and the 1997 fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standards (NAAQS) as it applies to Albuquerque/Bernalillo County. The revision addresses one element of CAA section 110(a)(2)(D)(i), which pertains to prohibiting air pollutant emissions from within a state to significantly contribute to nonattainment of the ozone and PM<INF>2.5</INF> NAAQS in any state. The Albuquerque/Bernalillo Air Quality Control Board (AQCB) is responsible for the portion of the New Mexico SIP that applies in Bernalillo County, which encompasses the City of Albuquerque. This rulemaking action is being taken under section 110 of the CAA.