C. A minor may be admitted to a mental health agency as defined in section 8-201 by the written application of the parent, guardian or custodian of the minor, or a person designated by the court if the parent, guardian or custodian is without monetary resources to file an application or could not be located after reasonable efforts and the minor is under the supervision of an adult probation department after the following has occurred:

1. 1. A psychiatric investigation by the medical director of the mental health agency that carefully probes the child's social, psychological and developmental background.
2. 2. An interview with the child by the medical director of the mental health agency.
3. 3. The medical director has explained to the child and the child's parent, guardian or custodian or to the person designated by the court pursuant to this subsection the program of evaluation or treatment contemplated and its probable length.
4. 4. The medical director has explored and considered available alternatives to inpatient treatment or evaluation.
5. 5. The medical director of a mental health agency has determined whether the child needs an inpatient evaluation or will benefit from care and treatment of a mental disorder or other personality disorder or emotional condition in the agency and whether the evaluation or treatment goals can be accomplished in a less restrictive setting. A record of the reasons for this determination shall be made.