730 ILCS 150/5-7
A person with a duty to register under paragraph (2.1) of subsection (c) of Section 3, who is released on probation or conditional discharge for conviction on a felony offense committed on or after July 1, 2011, shall, prior to release be notified of his or her duty to register as set forth in Section 5 of this Act. A person with a duty to register under paragraph (2.1) of subsection (c) of Section 3 who is discharged, paroled, or released from a Department of Corrections facility or other penal institution shall be notified of his or her duty to register as set forth in Section 4 of this Act. Any other person with a duty to register under paragraph (2.1) of subsection (c) of Section 3, who is unable to comply with the registration requirements because he or she is otherwise confined or institutionalized shall register in person within 3 days after release or discharge.
730 ILCS 150/5-7