20 ILCS 1807/79

Conviction of offense charged, lesser included offenses, and attempts. (a) An accused may be found guilty of any of the following: (1) The offense charged. (2) A lesser included offense. (3) An attempt to commit the offense charged. (4) An attempt to commit a lesser included offense, if the attempt is an offense in its own right. (b) In this Article, "lesser included offense" means: (1) an offense that is necessarily included in the offense charged; and (2) any lesser included offense so designated by regulation prescribed by the Governor. (c) Any designation of a lesser included offense in a regulation referred to in subsection (b) shall be reasonably included in the greater offense.