This action promulgates regulations setting forth the procedures and terms under which the Administrator will administer programs for issuing operating permits to covered stationary sources, pursuant to title V of the Clean Air Act as amended in 1990 (Act). Although the primary responsibility for issuing operating permits to such sources rests with State, local, and Tribal air agencies, EPA will remedy gaps in air quality protection by administering a Federal operating permits program in areas lacking an EPA-approved or adequately administered operating permits program. Federally issued permits will clarify which requirements apply to sources and will enhance understanding of and compliance with air quality regulations.