Missouri Revised Statutes Title XL. Additional Executive Departments § 632.110. Minors to be accepted for evaluation, when, by whom--may then be admitted to mental health facility--parent or guardian to consent--peace officer may transport to facility, when

1. The head of a private mental health facility may, and the head of a department mental health facility shall, except in the case of a medical emergency and subject to the availability of suitable programs and accommodations, accept for evaluation, on an outpatient basis if practicable, any minor for whom an application for voluntary admission is made by his parent or other legal custodian.  The department may require that a community-based service where the minor resides perform the evaluation pursuant to an affiliation agreement or contract with the department.

2. If the minor is diagnosed as having a mental disorder, other than an intellectual disability or developmental disability without another accompanying mental disorder, and found suitable for inpatient treatment as a result of the evaluation, the minor may be admitted by a private mental health facility or shall be admitted by a department mental health facility, if suitable accommodations are available, for care, treatment and rehabilitation as an inpatient for such periods and under such conditions as authorized by law.  The department may require that a community-based service where the patient resides admit the person for inpatient care, treatment and rehabilitation pursuant to an affiliation agreement and contract with the department.

3. The parent or legal custodian who applied for the admission of the minor shall have the right to authorize his evaluation, care, treatment and rehabilitation and the right to refuse permission to medicate the minor;  except that medication may be given in emergency situations.

4. The parent or legal custodian may request a peace officer to take a minor into custody and transport him to the mental health facility for evaluation if the parent or legal custodian applies for such evaluation under subsection 1 of this section.