105 ILCS 5/10-22.31a
To enter into joint agreements with other school boards or public institutions of higher education to establish any type of educational program which any district may establish individually, to provide the needed educational facilities and to employ a director and other professional workers for such program. The director and other professional workers may be employed by one district which shall be reimbursed on a mutually agreed basis by other districts that are parties to the joint agreement. Such agreements may provide that one district may supply professional workers for a joint program conducted in another district. Such agreement shall be executed on forms provided by the State Board of Education and shall include, but not be limited to, provisions for administration, staff, programs, financing, housing, transportation and advisory body and provide for the withdrawal of districts from the joint agreement by petition to the regional board of school trustees. Such petitions for withdrawal shall be made to the regional board of school trustees of the region having supervision and control over the administrative district and shall be acted upon in the manner provided in Article 7 for the detachment of territory from a school district.
To designate an administrative district to act as fiscal and legal agent for the districts that are parties to such a joint agreement.
105 ILCS 5/10-22.31a