60 ILCS 1/100-15
In addition to any powers that it may exercise under the Government Salary Withholding Act, the township board may provide, for the benefit of the township's employees, officials, or retired officials and their dependents, group life, health, accident, hospital, or dental insurance or any combination of those types of insurance. The insurance may include provision for employees, officials, retired officials, and their dependents who rely on treatment by prayer or spiritual means alone for healing in accordance with the tenets and practice of a well recognized religious denomination. The township board may provide for payment by the township of all or a portion of the premium or charge for the insurance for covered persons, except that the township may not pay all or a portion of the premium or charge for the insurance for retired officials and their dependents. If the township board undertakes a plan under which the township does not pay the entire amount of premiums or charges for the insurance, the board may provide for withholding and deducting from the compensation of its employees or officers amounts required to pay the balance of the premiums or charges.
60 ILCS 1/100-15