70 ILCS 3615/4.10
The Authority shall not for any fiscal year of the Authority release to the Chicago Transit Authority any funds except for the proceeds of taxes imposed by the Authority under Sections 4.03 and 4.03.1 which are allocated to the Chicago Transit Authority under Section 4.01(d) unless a unit or units of local government in Cook County (other than the Chicago Transit Authority) enters or enter into an agreement with the Chicago Transit Authority to make a monetary contribution for such year of at least $5,000,000 for public transportation.
Except as otherwise provided in this Section, the Authority shall not for any fiscal year of the Authority release to the Chicago Transit Authority any funds except for the proceeds of taxes imposed by the Authority under Sections 4.03 and 4.03.1 which are allocated to the Chicago Transit Authority under Section 4.01(d) unless the County of Cook and City of Chicago continue to provide services to the Chicago Transit Authority at the same level and on the same basis as are being provided by such units as of the effective date of this Act. The Authority may from time to time approve reductions in the level and basis of services to be provided pursuant to this Section.
70 ILCS 3615/4.10