Tex. Insurance Code - Not Codified § 5.31

(a) Said Board shall have full power and authority to alter, amend, modify or change any rate fixed and determined by it on thirty (30) days' notice, or to prescribe that any such rate or rates shall be in effect for a limited time, and said Board shall also have full power and authority to prescribe reasonable rules whereby in cases where no rate of premium shall have been fixed and determined by the Board, for certain risks or classes of risks, policies may be written thereon at rates to be determined by the company. Such company or companies shall immediately report to said Board such risk so written, and the rates collected therefor, and such rates shall always be subject to review by the Board.

(b) Notwithstanding Subsection (a) of this article, on and after the effective date of S.B. 14, Acts of the 78th Legislature, Regular Session, 2003, rates for homeowners and residential fire and residential allied lines insurance coverage under this subchapter are determined as provided by Subchapter Q of this chapter, and rates for other lines of insurance subject to this subchapter are determined as provided by Article 5.13-2 of this code, except that on and after December 1, 2004, rates for all lines of insurance subject to this subchapter are determined as provided by Article 5.13-2 of this code.