(a) The State Board of Insurance shall have the sole and exclusive power and authority and it shall be its duty to prescribe, fix, determine and promulgate the rates of premiums to be charged and collected by fire insurance companies transacting business in this State. Said Board shall also have authority to alter or amend any and all such rates of premiums so fixed and determined and adopted by it, and to raise or lower the same, or any part thereof, as herein provided.
(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.