Wash. Admin. Code § 480-80-133
(1) A utility must file a tariff adoption notice with the commission when either of the following changes affects an existing tariff:
(3) Content of the tariff adoption notice must contain, at a minimum, the following:
(Name of Utility) adopts and makes its own in every respect all tariffs, supplements and amendments filed with the Washington Utilities and Transportation Commission by (Name of Previous Utility or Prior Name of the Utility) prior to (Date).
(6) Until the utility that adopted a tariff refiles the tariff in its own name, all changes after the adoption must include:
[Statutory Authority: RCW 80.01.040 and 80.04.180. WSR 02-11-081 (Docket No. U-991301, General Order No. R-498), § 480-80-133, filed 5/14/02, effective 6/17/02.]