Within 60 days after appointment, the initial trustees shall divide the sanitary district into 3 wards that are compact, contiguous, and substantially equal in population for the purpose of electing trustees from those wards.
The first board of trustees elected after each decennial federal census shall also determine by lot at their first meeting the lengths of their terms. One trustee and his or her successors shall serve terms of 4 years, 4 years, and 2 years; the second trustee and his or her successors shall serve terms of 4 years, 2 years, and 4 years; the third trustee and his or her successors shall serve terms of 2 years, 4 years, and 4 years.
70 ILCS 3020/15