(a) Any such fire insurance company shall have the right at any time to petition the Board for an order changing or modifying any rate or rates fixed and determined by the Board, and the Board shall consider such petition in the manner provided in this subchapter and enter such order thereon as it may deem just and equitable.
(b) Notwithstanding Subsection (a) of this article, on and after the effective date of S.B. No. 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.