30 Tex. Admin. Code § 117.1256
A revised final control plan may be submitted by the owner or operator, along with any required permit applications. Such a plan must adhere to the requirements and the final compliance dates of this division (relating to Houston-Galveston-Brazoria Ozone Nonattainment Area Utility Electric Generation Sources). For sources complying with §§ 117.1205, 117.1210, or 117.1215 of this title (relating to Emission Specifications for Reasonably Available Control Technology (RACT); Emission Specifications for Attainment Demonstration; and Alternative System-Wide Emission Specifications), replacement new units may be included in the control plan. The revision of the final control plan is subject to the review and approval of the executive director.
30 Tex. Admin. Code § 117.1256