When a document contains classified information from multiple sources, what is required?

When a document incorporates classified information from multiple sources, it is essential to retain and accurately reflect each source's classification markings. This is vital to ensure the integrity and traceability of the classified information, as each source may have different handling and dissemination requirements determined by their specific classification levels.

By accurately reflecting the markings, users of the document are informed of the classification levels of information contained within and understand the limitations on access and distribution. This practice upholds the principles of protecting national security data and adhering to established marking guidelines, which require that information not be downgraded or obscured unnecessarily.

This approach also helps in fostering responsible information sharing and ensures compliance with security protocols, allowing individuals to handle each piece of information according to its unique classification requirements.