When a child is reported lost or missing, Department search procedures shall be followed. The search procedures are in three phases. In order that the employee in command be kept informed, the chain of command shall be adhered to within the Division currently responsible for each phase of the investigation and such officer shall have full command. Complete cooperation shall be given by other Divisions concerned, through functional supervision. The exception will be emergency situations that may arise which, due to the time element, cannot be handled through routine channels.