Ill. Admin. Code tit. 89, § 404.27
a) Written agreements for care and service shall be entered into between the institution and the parent or guardian and the referring agency, in order to protect the interest of the child and all other parties concerned and shall include:
b) Written consents from legally responsible persons (parent, court, or other legal custodian or guardian) shall be obtained for certain acts of a child or performance of certain acts on his behalf, including but not limited to: