304.15-311 "Operative date of the valuation manual" defined. The term "operative date of the valuation manual" means January 1 of the first calendar year that the valuation manual is operative, as defined in KRS 304.6-131(11). Effective: June 24, 2015 History: Created 2015 Ky. Acts ch. 57, sec. 15, effective June 24, 2015.