(1) This section applies to tariff changes for other than those that are subject to WAC 480-90-194.

(2) A utility that files a tariff change to increase any charge that a customer may incur without being quoted a rate or price (e.g., late payment fees, insufficient fund charges, or a one-time charge) must provide notice to each affected customer on or with the first bill after the change becomes effective.

(a) At a minimum, the notice must include the effective date, a clear description of changes to rates or services and a utility contact number where customers may seek additional information.

(b) Methods of notice permitted include a bill insert, bill message, printing on the billing envelope, a separate mailing to all affected customers or, if the utility has the capability and the customer has authorized, by email.

(3) A utility that files a tariff change that decreases rates, including promotions that temporarily waive recurring or nonrecurring charges, or that changes terms or conditions without restricting access to the service, must publish the change in the manner it posts tariffs under WAC 480-90-193.