405 ILCS 5/4-304

A person may be admitted pursuant to the recommendation of the diagnostic report. At the time of admission, a clear written statement and oral explanation of the procedures for discharge, transfer and objection to admission shall be given to the person if he is 12 years of age or older and to the person who executed the application. Within 3 days of the admission, notice of the admission and an explanation of the objection procedure shall be sent or given to the persons specified in Section 4-206.