The EPA is approving State Implementation Plan (SIP) revisions submitted by the Governor of New Mexico on September 7, 2004. The submittal revises the second ten-year carbon monoxide (CO) maintenance plan for the Albuquerque/Bernalillo County, New Mexico area. The submittal also revises the relevant parts of the New Mexico Administrative Code (NMAC) including revisions to the General Provisions, Inspection and Maintenance (I&M) Program, and the contingency measures. We are approving these revisions in accordance with the requirements of the Federal Clean Air Act (the Act).