805 ILCS 5/11.10
A corporation may acquire all of the issued or outstanding shares of one or more classes of another corporation in the following manner:
The board of directors of each corporation shall, by resolution adopted by a majority vote of members of each such board, approve a plan of exchange setting forth:
(d) Other provisions considered necessary or desirable with respect to the exchange, including provisions, if any, under which the proposed exchange may be abandoned prior to the filing of articles of exchange by the Secretary of State.
This Section does not limit the power of a corporation to acquire all or part of the shares of one or more classes of another corporation through a voluntary exchange or otherwise by agreement with the shareholders.
(from Ch. 32, par. 11.10)
(Source: P.A. 85-1269.)