(1)    In this section:

      (a)    “Local governmental unit” has the meaning given in s. 66.0713 (1) (c).

      (b)    “Public improvement” has the meaning given in s. 66.0713 (1) (d).

   (2)   If a special assessment is levied for any public improvement, any amount collected on that special assessment or received from the county shall be deposited in the general fund of the local governmental unit if the payment for the improvement was made out of its general fund, deposited in the funds and accounts of a public utility established under s. 66.0621 (4) (c) if the improvement was paid out of the proceeds of revenue obligations of the local governmental unit, or deposited in the debt service fund required for the payment of bonds or notes issued under ch. 67 if the improvement was paid out of the proceeds of the bonds or notes. That special assessment, when delinquent, shall be returned in trust for collection and the local governmental unit has the same rights as provided in s. 67.16 (2) (c).