Illinois Statutes20 ILCS 801/ Department of Natural Resources Act.Article 1 - General ProvisionsArticle 10 - Office Of Mines And MineralsArticle 15 - Office Of Scientific Research And AnalysisArticle 20 - State MuseumArticle 5 - Office Of Water ResourcesArticle 80 - Transition ProvisionsArticle 99 - Severability And Effective Date