65 ILCS 5/9-2-135
No person accepting the vouchers or bonds as provided in this Division 2 shall have any claim or lien upon the municipality in any event for the payment of his vouchers or bonds or the interest thereon, except from the collection of the assessment against which the vouchers or bonds are issued. The municipality, nevertheless, shall not be in any way liable to the holders of these vouchers or bonds in case of a failure to collect the assessment, but with all reasonable diligence, so far as it can legally do so, it shall cause a valid special assessment or a special tax, as the case may be, to be levied and collected, to pay these bonds and vouchers, until all bonds and vouchers are fully paid. Any holder of vouchers or bonds, or his assigns, shall be entitled to summary relief by way of mandamus or injunction to enforce the provisions of this section.
65 ILCS 5/9-2-135