The developer may reserve the right to add additional property to that which has been submitted to the provisions of this Act, and in the event of any addition, to reallocate percentage interests in the common elements in accordance with the provisions of this Act and the condominium instruments by: recording an amended plat in accordance with the provisions of Section 5 of this Act, together with an amendment to the declaration in accordance with Section 6 of this Act. Notwithstanding any other provisions of this Act requiring approval of unit owners, no approval shall be required if the developer complies with the requirements of this Section.
If the developer wishes to reserve the right to add additional property, the declaration shall contain:
Subject to any restrictions and limitations specified by the condominium instruments, there shall be an appurtenant easement over and on the common elements for the purpose of making improvements on the additional land, and for the purpose of doing what is reasonably necessary and proper in conjunction therewith.
No provision of this Act shall be binding upon or obligate the developer to exercise his option to make additions or bind the land described in the condominium instruments. No provision of the condominium instruments shall be construed to be binding upon or obligate the developer to exercise his option to make additions, and the land legally described therein shall not be bound thereby, except in the case of any covenant, restriction, limitation, or other representation or commitment in the condominium instruments, or in any other agreement made with, or by, the developer, requiring the developer to add all or any portion of the additional land, or imposing any obligation with regard to anything that is or is not to be done thereon or with regard thereto, or imposing any obligations with regard to anything that is or is not to be done on or with regard to the property or any portion thereof, this Section shall not be construed to nullify, limit, or otherwise affect any such obligation.
Any amendment to the declaration adding additional land may contain such complementary additions and modifications of the provisions of the declaration affecting the additional land which are necessary to reflect the differences in character, if any, of the additional land and the improvements thereto. In no event, however, shall any such amendment to a declaration revoke, modify or add to the covenants established by the declaration for the property already subject to the declaration.
765 ILCS 605/25