EPA is approving portions of three revisions to the Texas State Implementation Plan (SIP) submitted by the State of Texas on August 31, 1993; July 22, 1998; and October 5, 2010. These revisions amend existing sections and create new sections in Title 30 of the Texas Administrative Code (TAC), Chapter 116--Control of Air Pollution by Permits for New Construction or Modification. The August 31, 1993, revision creates two new sections for the use of emission reductions as offsets in new source review permitting. The July 22, 1998, revision allows for the use of Discrete Emission Reduction Credits (DERC) to exceed emission limits in permits (permit allowables) and updates internal citations to other Texas regulations. The October 5, 2010, revision updates internal citations to other Texas regulations. EPA has determined that these SIP revisions comply with the Clean Air Act and EPA regulations and are consistent with EPA policies. This action is being taken under authority of the Federal Clean Air Act (the Act or CAA).