The commission may prescribe the necessary rules to place RCW 80.04.300 through 80.04.330 in operation. It may, by rule, establish criteria to exempt companies in whole or in part from the operation thereof. The commission may upon request of any company withhold from publication during such time as the commission may deem advisable any portion of any original or supplementary budget relating to proposed capital expenditures.
RCW 80.04.320