Washington Revised Code Title 81. Transportation § 81.04.236. When cause of action deemed to accrue

The cause of action for the purposes of RCW 81.04.235, 81.04.240, and 81.28.270 shall be deemed to accrue: (a) In respect of a shipment of property, upon delivery or tender of delivery thereof by the carrier, and not after; (b) in respect of goods or service or services other than a shipment of property, upon the rendering of an invoice or statement of charges by the public service company, and not after.

The provisions of this section shall extend to and embrace cases in which the cause of action has heretofore accrued as well as cases in which the cause of action may hereafter accrue.