What is required of each service under Key West Agreement regarding joint use?

• A. They must observe general principles and fulfill functions while using other services' resources when economy and effectiveness improve.
• B. They must never share resources with other services.
• C. They must merge into a single Unified Military Command.
• D. They must prioritize their own service's resources.

Answer: (A)

Under Key West, each service keeps its own assigned functions, but may use the resources of the other services when doing so improves economy and effectiveness. This promotes practical cooperation and reduces duplication without forcing a merger or creating rigid isolation. The idea is to maintain service identities while leveraging shared assets to get better overall military results. The other options would contradict that spirit by insisting on no sharing, merging into one command, or prioritizing only one service’s resources.