Any benefits accruing to the participants in a retirement plan established under this subsection shall be protected from impairment in accordance with Article XIII, Section 5 of the Illinois Constitution. However, the unit of local government establishing such a plan may terminate it at any time, unless it has otherwise contractually agreed with its participating employees.
This Section does not limit the power or authority of any unit of local government, school district or any institution supported in whole or in part by public funds to establish and administer any other deferred compensation plans that may be authorized by law and deemed appropriate by the officials of such subdivisions or institutions.
40 ILCS 5/24-107