805 ILCS 110/41
Upon the incorporation of any congregation, church or society, all real and personal property held by any person or trustees for the use of the members thereof, shall immediately vest in such corporation and be subject to its control, and may be used, mortgaged, sold and conveyed the same as if it had been conveyed to such corporation by deed; but no such conveyance or mortgage shall be made so as to affect or destroy the intent or effect of any grant, legacy or donation that may be made to such person or trustee for the use of such congregation, church or society. However, this limitation on the disposition of real or personal property does not apply to the extent that a restriction imposed by a donor on the use of an institutional fund may be released by the governing board of an institution under the Uniform Prudent Management of Institutional Funds Act .
805 ILCS 110/41