1. A voluntary patient who is a minor and who requests his release either orally or in writing, or whose release is requested in writing to the head of the facility by his parent, spouse, adult next of kin, or person entitled to his custody, shall be released immediately; except, that if the patient was admitted on the application of another person, his release shall be conditioned upon receiving the consent of the person applying for his admission.

2. If the head of the mental health facility determines that the minor is mentally disordered and, as a result, presents a likelihood of serious physical harm to himself or others, the head of the facility may refuse the release. The mental health facility may detain the minor only if a mental health coordinator, a licensed physician, a mental health professional or a registered professional nurse designated by the facility and approved by the department completes an application for detention for evaluation and treatment to begin the involuntary detention of the minor under this chapter or, if appropriate, the minor is detained in the facility under the provisions of chapter 211.