RCW 47.56.248: Credit permits for vehicular passage—Cash deposit or bond—Revocation of permit.

The department may require the holder of the permit to furnish to and maintain in force with the department a cash deposit or a corporate surety bond. The department may require the holder of the permit to increase the amount of cash bond, or to furnish an additional surety bond, or may reduce the amount of the cash bond or surety bond required, as the amount of charges incurred and regularity of payment warrant, or may revoke any permit granted for failure of the holder to comply with any of its terms.