Every public utility shall file with and as a part of such schedule all rules and regulations that in any manner affect the rates charged or to be charged for any service.
(Mar. 4, 1913, 37 Stat. 981, ch. 150, § 8, par. 25.)
1981 Ed., § 43-524.
1973 Ed., § 43-324.
Rate change procedures, appeal and review, see § 34-901.