(1) Unless the commissioner enters an order pursuant to KRS 304.13-041 declaring workers' compensation to be a noncompetitive market, rates filed for use after December 31, 1998, shall be filed pursuant to KRS 304.13-051(1).
(2) Notwithstanding the provisions of KRS 304.13-051 to the contrary, after December 31, 1998, no insurer providing workers' compensation insurance shall place into effect any rates, manuals, or underwriting rules for workers' compensation insurance which it proposes to use pursuant to KRS 304.13-051(1) or (4) if the rates, manuals, or underwriting rules will result in an increase or decrease of more than fifteen percent (15%) from the workers' compensation insurer's then-existing workers' compensation insurance rates for any classification of risks within a twelve (12) month period of time.
(3) After December 31, 1998, any workers' compensation insurer which proposes to change its then-existing rates, manuals, or underwriting rules so as to effectively increase or decrease the rates of any classification of risks more than fifteen percent (15%) within a twelve (12) month period shall file all the rates and supplemental rating information which shall not become effective until approved by the commissioner pursuant to the provisions of KRS 304.13-051.