Briefing slides should have markings indicating what?

Briefing slides should have markings indicating the highest classification of the entire slide deck to ensure proper handling and dissemination of sensitive information. This marking is crucial as it informs all personnel interacting with the slides of the level of security needed to protect the content. It helps to maintain compliance with regulatory guidelines regarding classified information and ensures that individuals are aware of their responsibilities in safeguarding this information. By clearly indicating the highest classification, anyone reviewing the slides can recognize how to appropriately manage, store, and share the information contained within, thus preserving national security or proprietary data as needed.