It was assumed that every case designated for DAC had the potential to become addicted, if not already addicted, and required a treatment strategy aimed at deterring addiction. The purpose of the phase/sanction DAC supervision protocol was to foster the reputation that drug use would not be tolerated in the Northern District of California and the view that any client who wanted to remain drug-free would receive appropriate treatment and support. The phase/sanction system stipulates that all new supervision cases with a substance abuse condition will commence a 1-year DAC program as soon after their referral as possible. In the first phase of 4 months, clients must submit a minimum of six random or eight scheduled urine tests per month and attend weekly Narcotics Anonymous meetings. In the second phase, clients have to submit at least four random or scheduled urine tests per month and attend weekly Narcotics Anonymous meetings. In the final phase, clients only have to submit a minimum of two randon urine tests per month and attend the meetings. Intervention options include drug-free counseling, psychotherapy, group counseling, family counseling, recovery groups, transition groups, substance abuse evaluations, and both short-term and long-term residential treatment. The Northern District of California's DAC program is considered to be an example of a highly structured and successful program of drug intervention and treatment, in combination with probation or parole supervision. 10 references