65 ILCS 5/7-1-41
Current through Public Act 103-593
After either the whole or a part of a municipality is annexed to another municipality, and, despite the construction of sewers in the annexed territory by special assessment, before annexation, the annexing municipality may construct additional sewers or a drainage system by the creation of drainage districts within the annexed territory by special assessment or special taxation.
65 ILCS 5/7-1-41