This action promulgates a proposed change to the definition of "major source". The change would no longer require States to provide that sources in categories subject to standards under section 111 or 112 promulgated after August 7, 1980 must include fugitive emissions in determining major source status under section 302 or part D of title I of the Act. The EPA is making this change to address a petition by the American Mining Congress (now known as the National Mining Association) challenging the requirement in the current regulation that sources in all section 111 or 112 categories must count fugitive emissions, regardless of when the section 111 or 112 standards were promulgated, in determining major source status under section 302 or part D of title I. By making this change, we will also allow full approval in several State programs that contain the August 7, 1980 date.