What action must an aircraft operator take regarding armed Law Enforcement Officers aboard?

The action that an aircraft operator must take regarding armed Law Enforcement Officers aboard is to notify the pilot in command and other crewmembers of their locations. This procedure is crucial for several reasons.

First, the pilot in command needs to be aware of the presence of armed personnel on board for security and situational awareness. In case of an emergency or an unusual situation, knowing the locations of these officers allows the flight crew to communicate effectively and coordinate any necessary responses.

Moreover, informing all crewmembers about the officers' locations ensures that everyone is informed and can act accordingly, especially regarding cabin protocol and passenger interactions. This helps maintain a secure environment on the flight, enhancing the overall safety of both the passengers and the crew.

The other options, while potential considerations in scenarios involving law enforcement, do not fulfill the regulatory requirement for clear communication and situational awareness needed on an aircraft.