Sec. 2006.005. RULES. The commissioner may adopt rules as necessary to implement this subchapter in addition to other rules adopted under this subchapter. Added by Acts 2005, 79th Leg., Ch. 727 (H.B. 2017), Sec. 2, eff. April 1, 2007. SUBCHAPTER B. OPTIONAL PREMIUM DISCOUNTS AND RATING PROGRAMS FOR CERTAIN RESIDENTIAL PROPERTY INSURANCE POLICIES