20 ILCS 2605/2605-54
The Illinois State Police shall adopt a policy and provide training to State Police officers concerning response and care for persons under the influence of alcohol or drugs. The policy shall be consistent with the Substance Use Disorder Act and shall provide guidance for the arrest of persons under the influence of alcohol or drugs, proper medical attention if warranted, and care and release of those persons from custody. The policy shall provide guidance concerning the release of persons arrested under the influence of alcohol or drugs who are under the age of 21 years of age which shall include, but not be limited to, language requiring the arresting officer to make a reasonable attempt to contact a responsible adult who is willing to take custody of the person who is under the influence of alcohol or drugs.
20 ILCS 2605/2605-54