Upon the acceptance of an application for examination and treatment by a minor 14 years or over but less than 18 years of age, the director of the facility shall promptly notify the minor's parents, guardian, or person standing in loco parentis, and shall inform them of the right to be heard upon the filing of an objection. Whenever such objection is filed, a hearing shall be held within 72 hours by a judge or mental health review officer, who shall determine whether or not the voluntary treatment is in the best interest of the minor.