In order to be admitted to an OTP that utilizes both methadone and buprenorphine, a person must meet the Diagnostics and Statistics Manual version 5 (DSM5) criteria for opioid use disorder (OUD). In order to receive methadone, a person must also meet the following criteria: a minimum of one year of addiction to opioids, as well as current evidence of opioid use disorder. Special circumstances apply to opioid dependent pregnant women, those recently released from a penal institution, and those who have been discharged from a program within the last two years, and they may be admitted without demonstration of the one-year minimum; and the applicant must be over 18 years of age, or if the applicant is under 18, (s)he must have parental consent and demonstrate at least two prior treatment episodes in either drug free treatment or short-term tapering.