Chapter 31. Drug Abuse, Alcohol Abuse, and Mental Illness Insurance Coverage. § 31–3101. Definitions. § 31–3102. Coverage. § 31–3103. Drug abuse and alcohol abuse benefits. § 31–3104. Mental illness benefits. § 31–3105. Exemptions. § 31–3106. Certification of nonhospital residential facilities and outpatient treatment facilities. § 31–3107. Preservation of certain benefits. § 31–3108. Notification of coverage and benefits. § 31–3109. Filing and rate requirements. § 31–3110. Health maintenance organizations. § 31–3111. Duties of Mayor. § 31–3112. Excluded programs.