Master-at-Arms (MA) C School Block 6 Practice Test

The correct duration for a Commanding Officer to notify civilian authorities after issuing a Military Protective Order (MPO) is 7 days. This timeframe is in accordance with military regulations that ensure timely communication regarding protective measures established under the MPO. This communication is crucial as it allows civilian authorities to be aware of the circumstances surrounding the order, which can assist them in taking appropriate actions to ensure safety and enforce the MPO as necessary.

In this context, the other options do not align with the established protocols for notifying civilian authorities, as they either exceed or do not meet the specified requirement of 7 days. Hence, understanding this timeline is significant for maintaining effective collaboration between military and civilian law enforcement agencies in situations involving protective orders.