When classified information is removed from storage during working hours, how must it be protected when not in use?

When classified information is removed from storage during working hours, it is critical to ensure that it is protected properly when not in use to prevent unauthorized access or disclosure. Keeping the documents face down and under constant surveillance provides a practical and effective means of safeguarding these sensitive materials.

By placing the documents face down, it minimizes the chance of anyone accidentally viewing confidential information, while constant supervision ensures that someone is always watching over the documents. This method allows for immediate action if someone unauthorized approaches the material, thereby ensuring the protection of classified information in a busy environment.

Other options, while they have merit in various contexts, do not offer the same level of immediacy and oversight. Storing in a secure cabinet or a locked drawer could imply the documents are out of sight and not being actively monitored, which may not provide adequate protection in a situation where personnel are still present and accessing information.