765 ILCS 160/1-20

    (765 ILCS 160/1-20)
    Sec. 1-20. Amendments to the declaration, bylaws, or operating agreement.

(a) The administration of every property shall be governed by the declaration and bylaws or operating agreement, which may either be embodied in the declaration or in a separate instrument, a true copy of which shall be appended to and recorded with the declaration. No modification or amendment of the declaration, bylaws, or operating agreement shall be valid unless the same is set forth in an amendment thereof and such amendment is duly recorded. An amendment of the declaration, bylaws, or operating agreement shall be deemed effective upon recordation, unless the amendment sets forth a different effective date.

(b) Unless otherwise provided by this Act, amendments to community instruments authorized to be recorded shall be executed and recorded by the president of the board or such other officer authorized by the common interest community association or the community instruments.

(c) If an association that currently permits leasing amends its declaration, bylaws, or rules and regulations to prohibit leasing, nothing in this Act or the declarations, bylaws, rules and regulations of an association shall prohibit  a unit owner incorporated under 26 USC 501(c)(3) which is leasing a unit at the time of the prohibition from continuing to do so until such time that the unit owner voluntarily sells the unit; and no special fine, fee, dues, or penalty shall be assessed against the unit owner for leasing its unit.

(d) No action to incorporate a common interest community as a municipality shall commence until an instrument agreeing to incorporation has been signed by two-thirds of the members.

(e) If the community instruments require approval of any mortgagee or
lienholder of record and  the mortgagee or lienholder of record receives a request to approve or consent to
the amendment to the community instruments, the mortgagee or lienholder of record is deemed to have
approved or consented to the request unless the mortgagee or lienholder of record delivers a negative
response to the requesting party within 60 days after the mailing of the request. A request to approve or consent to an amendment to the community instruments that is required to be sent to a mortgagee or lienholder of record shall be sent by certified mail.

(Source: P.A. 99-41, eff. 7-14-15; 100-292, eff. 1-1-18.)