An employee appointed under this part as legal guardian, conservator, or trustee for a person shall have sufficient background to understand the person's mental illness, serious emotional disturbance, or developmental disability. Accepting an appointment may not be made a condition of employment unless the duties are a normal part of the employee's duties and there is no conflict of interest. No employee may be appointed as legal guardian, conservator, or trustee of a person who is in the facility in which the employee works.