Amends 6.15.020, 6.15.050, 6.15.070, 6.15.080, 6.15.100, 6.15.110, 6.15.115, 6.15.130 and adds new sections 6.15.055, 6.15.115, 6.15.135, and 6.15.137 relating to business and occupation tax of utilities. (§3 amended by 00-31 §1)(§2 amended by 03-1 §1) (§1 amended by 18-24 §2, 2018)