Illinois rules of evidence supreme court order filed september 27 2010 adopting illinois rules of evidence effective january 1 2011 view 2012 rules of evidence changes. currently illinois rules of evidence are dispersed throughout case law statutes and illinois supreme court rules requiring that they be researched and ascertained from a number of sources trial practice requires that the most frequently used rules of evidence be readily accessible preferably in an authoritative form the. The illinois rules of evidence are created by the illinois supreme court some provisions are incorporated by statutes but the comprehensive all encompassing system is created by the high court illinois supreme court rules of evidence color coded pdf of the rules of evidence. Illinois rules of evidence require that proper foundation be laid for certain evidence at the hearing on the motions the parties disputed whether the state could lay an adequate foundation the state represented that it would introduce evidence at trial that 1 santos was the last name of defendants mother