424.9  Bond for environmental protection charge collection.
  The director, when necessary and advisable in order to secure the collection of the environmental protection charge imposed by section 424.3, may require a depositor to file a bond with the director. The bond shall assure collection by the department of the amount of the charge required to be collected or the amount actually collected by the depositor required to file the bond, whichever is greater. The bond shall be issued by a surety company authorized to conduct business in this state and approved by the commissioner of insurance as to solvency and responsibility, in an amount as the director may fix, to secure the payment of the charge, and penalty due or which may become due. In lieu of the bond, securities or cash shall be kept in the custody of the department and securities may be sold by the director at public or private sale, without notice to the depositor, if it becomes necessary to do so in order to recover any charge and penalty due. Upon a sale, any surplus above the amounts due under this section shall be returned to the person who deposited the securities.
89 Acts, ch 131, §21