ILLINOIS LAWS720 ILCS 5/11-1.2 – Criminal Sexual AssaultUnder Illinois law, rape is termed Criminal Sexual AssaultA person commits criminal sexual assault if that person commits an act of sexual penetration and:1. uses force or threat of force;2. knows that the victim is unable to understand the nature of the act or is unable to give knowing consent;3. is a family member of the victim, and the victim is under18 years of age; or4. is 17 years of age or over and holds a position of trust, autho...