RCW 46.17.360
RCW 46.17.360: Monthly declared gross weight license fees.
A person applying for a monthly declared gross weight license as authorized in RCW 46.16A.455 shall pay an additional two dollars for each month of the declared gross weight license, plus an additional two dollars. These two dollar fees must be deposited in the motor vehicle fund created in RCW 46.68.070 .