On June 1, 2009, Illinois’ new Young Adult Dependent Coverage Law (215 ILCS 356z.12) gives parents with health and/or dental insurance policies that cover dependents the right to add or continue coverage for unmarried dependents under age 26 (or 30 for some U.S. military veterans) regardless of student status.
This is in addition to an Illinois law, 215 ILCS 356z.14, that went into effect on December 12, 2008, that requires all individual and group health insurance policies and HMO contracts to provide coverage up to an annual limit of $36,000 for the diagnosis and treatment of autism spectrum disorders for children under 21.
See www.insurance.illinois.gov for more details on both laws.