(a) In Brazoria, Chambers, Collin, Dallas, Denton, Ellis, Fort Bend, Galveston, Harris, Johnson, Kaufman, Liberty, Montgomery, Parker, Rockwall, Tarrant, Waller, and Wise Counties, the compliance date has passed and the owner or operator of an application process shall continue to comply with this division except as specified in subsections (c) and (d) of this section.
(b) The owner or operator of an application process that becomes subject to this division on or after the applicable compliance date in this section shall comply with the requirements in this division no later than 60 days after becoming subject.
(c) The owner or operator of an application process in Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, and Wise Counties shall comply with §115.473(e) of this title (relating to Control Requirements) by no later than 270 days after the commission publishes notification in the Texas Register of its determination that this contingency rule is necessary as a result of EPA publication of a notice in the Federal Register that the specified area failed to attain the applicable National Ambient Air Quality Standard for ozone by the attainment deadline or failed to demonstrate reasonable further progress as set forth in the 1990 Amendments to the Federal Clean Air Act, §172(c)(9).
(d) The owner or operator of an application process in Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller Counties shall be in compliance with §115.473(f) of this title by no later than 270 days after the commission publishes notification in the Texas Register of its determination that this contingency rule is necessary as a result of EPA publication of a notice in the Federal Register that the specified area failed to attain the applicable National Ambient Air Quality Standard for ozone by the attainment deadline or failed to demonstrate reasonable further progress as set forth in the 1990 Amendments to the Federal Clean Air Act, §172(c)(9).
(e) The owner or operator of an application process in the Bexar County area subject to the requirements of this division shall comply with the requirements of this division no later than January 1, 2025.

Source Note: The provisions of this §115.479 adopted to be effective December 29, 2011, 36 TexReg 8897; amended to be effective June 25, 2015, 40 TexReg 3907; amended to be effective May 16, 2024, 49 TexReg 3292