765 ILCS 120/6
This Act shall not be construed to imply that any restriction, easement, covenant or condition which does not have the benefit of the Act shall, on account of any provision herein, be unenforceable. Nothing in this Act shall diminish the powers granted in any other law to acquire by purchase, gift, grant, eminent domain or otherwise and to use land for public purposes. A conservation right shall not be extinguished by adverse possession, a claim of abandonment, or merger, and may be extinguished only by such procedure as may be set forth in the conservation right or by a release of the conservation right in accordance with the terms of the conservation right. No prescriptive easement shall be established that adversely impacts the conservation values protected by the conservation right.
765 ILCS 120/6