Sales representatives—Rights and remedies not exclusive—Waiver void.
(1) RCW 49.48.150 through 49.48.190 supplement but do not supplant any other rights and remedies enjoyed by sales representatives.
(2) A provision of RCW 49.48.150 through 49.48.190 may not be waived, whether by express waiver or by attempt to make a contract or agreement subject to the laws of another state. A waiver of a provision of RCW 49.48.150 through 49.48.190 is void.