315 ILCS 30/19
Prior to making a sale or conveyance of any part of the real property within the area of a redevelopment project pursuant to any of the foregoing Sections of this Act, the Department shall prepare and approve a plan for the development or redevelopment of the project area and shall submit the same to the governing body of the municipality in which the real property is situated for their approval. The Department shall not make a sale or conveyance of any part of the real property in the project area until such time as the plan has been approved by the governing body of the municipality in which the real property is situated; provided, however, that any plan for the development or redevelopment of a project area heretofore prepared and approved by a land clearance commission prior to the effective date of this amendatory Act of the 102nd General Assembly pursuant to the Blighted Areas Redevelopment Act of 1947 (repealed), and heretofore approved by the State Housing Board and the governing body of the municipality shall be sufficient to authorize a sale pursuant to this Section. At the time of making any such sale or conveyance, the purchaser shall agree to reimburse any public utility as defined in the Public Utilities Act for the costs of relocation of the facilities of such public utility made necessary by the plan for the development or redevelopment of the project area, except and excluding, however, any such costs to the extent incurred for the relocation of such facilities located, prior to the development or redevelopment, in a public way or public property which retains its character as such thereafter.
315 ILCS 30/19