The function of mail classification rates belongs to personnel within what facility?

The function of mail classification rates is primarily associated with the Military Post Office. This facility is responsible for the processing and delivery of mail for military personnel, which includes classifying mail according to established rates based on weight, size, destination, and service type. The Military Post Office ensures that all outgoing and incoming mail meets necessary regulations and is appropriately classified for efficient handling and delivery.

Other facilities like the Air Mail Center and Network Distribution Center play important roles in the overall logistics and transportation of mail but do not specifically focus on the classification of mail rates. The Logistics Support Office, while critical in supporting logistics operations, does not handle mail classification directly. Thus, the Military Post Office is the correct answer as it directly manages the classification functions related to military mail services.