EPA approves revisions to the State Implementation Plan (SIP) submitted by the Governor of North Dakota with a letter dated June 21, 2001. The revisions affect air pollution control rules regarding general provisions, emissions of particulate matter and fugitives, exclusions from Title V permit to operate requirements, and prevention of significant deterioration. EPA will handle separately direct delegation requests for emission standards for hazardous air pollutants for source categories and the State's Acid Rain Program. This action is being taken under section 110 of the Clean Air Act.