Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving portions of two Texas State Implementation Plan (SIP) submittals that pertain to the good neighbor and interstate transport requirements of the CAA with respect to the 1997 ozone National Ambient Air Quality Standards (NAAQS). The good neighbor provision requires each state, in its SIP, to prohibit emissions that will significantly contribute to nonattainment, or interfere with maintenance, of a NAAQS in other states. In this action, EPA is approving the Texas SIP submittals as having met the requirements of the good neighbor provision for the 1997 ozone NAAQS in accordance with section 110 of the CAA.