What is the highest precedence normally authorized for administrative messages?

The correct answer is Priority, which signifies the standard level of urgency assigned to administrative messages in military communication. Priority messages are typically used for significant administrative communications that require timely attention but do not demand immediate reaction. This precedence allows for the efficient handling of important information while still maintaining order in the flow of messages.

In contrast, Immediate and Flash are higher precedence levels that are reserved for urgent operational communications requiring swift action or decision-making. These are not generally assigned to administrative messages as they trigger expedited handling and responses. Routine, on the other hand, is the lowest priority status and is used for non-urgent messages, which would not adequately convey the importance of administrative communications that still require timely attention but are not emergencies. Thus, Priority strikes the right balance for handling administrative matters effectively.