For a copy of the Illinois State Police Handbook on Criminal Codes which lists all criminal code numbers and has a brief description of each crime go here.
For Illinois criminal statutes go here.
For Illinois Substance Abuse Act and description of criminal statutes and sentences go here. Look at article IV section 401.
For Illinois Cannabis Control Act go here.
For Illinois methamphetamine control act go here.
For other crimes not listed above in Illinois search this list of statutes here.