The measure eliminates criminal penalties for possession of specified quantities of controlled substances by adults and juveniles involving: heroin (1 gram or less), cocaine (2 grams or less), methamphetamine (2 grams or less), MDMA (less than 1 gram or 5 pills), LSD (less than 40 user units), psilocybin (less than 12 grams), methadone (less than 40 user units) and oxycodone (less than 40 pills, tablets, or capsules). Instead, possession of these specified quantities of controlled substances becomes a non-criminal Class E violation for which the maximum punishment is a $100 fine or completion of a health assessment with an addiction treatment professional. The measure also reduces penalties for possession of controlled substances, other than possession constituting a commercial drug offense, in amounts greater than specified quantities, to a misdemeanor with less than a year imprisonment, a $6,250 fine, or both.