RCW 35.21.698
RCW 35.21.698: Regulation of financial transactions—Limitations.
A city, town, or governmental entity subject to this title may not regulate the terms, conditions, or disclosures of any lawful financial transaction between a consumer and (1) a business or professional under the jurisdiction of the department of financial institutions, or (2) any financial institution as defined under *RCW 30.22.041 .