The application for admission under Section 3-503 or 3-504 shall contain in large, bold-face type a statement in simple nontechnical terms of the minor’s objection and hearing rights under this Article. A minor 12 years of age or older shall be given a copy of the application and his right to object shall be explained to him in an understandable manner. A copy of the application shall also be given to the person who executed it, to the minor’s parent, guardian or person in loco parentis, and attorney, if any, and to 2 other persons whom the minor may designate.