755 ILCS 5/1-2.23

"Standby guardian" means: (i) a guardian of the person or estate, or both, of a minor, as appointed by the court under Section 11-5.3, to become effective at a later date under Section 11-13.1 or (ii) a guardian of the person or estate, or both, of a person with a disability, as appointed by the court under Section 11a-3.1, to become effective at a later date under Section 11a-18.2.