Every alien bank branch, the deposits of which are not insured by the Federal Deposit Insurance Corporation, shall display at its place of business in Washington a sign at least seven inches by three inches at each window or place where deposits are accepted stating that deposits are not insured by the Federal Deposit Insurance Corporation. A statement may be included on the same sign to the effect that deposits of U.S. domiciled depositors are partially protected by capital maintained pursuant to RCW 30.42.120(1).