The Commissioner of Mental Health and Addiction Services shall designate mental health regions within the state. Such regions and boundaries thereof may be redesignated by said commissioner as he deems necessary. For the purposes of sections 17a-476 and 17a-478 to 17a-480, inclusive, “community mental health services” means comprehensive services, both medical and nonmedical, designed to (1) decrease the prevalence and incidence of psychiatric disabilities, emotional disturbance and social disfunctioning, and (2) promote mental health in individuals, groups and institutions and includes, but is not limited to, the following: Outreach and case finding, inpatient treatment, outpatient treatment, partial hospitalization, diagnosis and screening, aftercare and rehabilitation, education, consultation, emergency services, research, evaluation, training and services to the courts. The Commissioner of Mental Health and Addiction Services may enter into such contracts for services as may be required to carry out the provisions of subsection (a) of section 17a-476, sections 17a-478 to 17a-480, inclusive, and sections 17a-482 and 17a-483.