Two elderly persons or two persons with disabilities who are not related to each other by blood or marriage shall not be prohibited from jointly occupying subsidized housing or a unit of subsidized housing solely because they are not related, provided they have filed a form for such joint occupation with the clerk of the county in which the housing they seek to occupy is located and otherwise meet all other eligibility requirements. A member of the joint occupancy may withdraw from the joint occupancy at any time.
310 ILCS 75/4