Under what condition may couriers store classified material in a hotel safe during overnight stops?

The option stating that couriers may store classified material in a hotel safe during overnight stops when the safe is equipped with an X-09 electromechanical lock and prior coordination is correct. This requirement is rooted in ensuring the security of classified materials. The use of an X-09 lock signifies a level of sophistication and security that is suitable for protecting sensitive information.

Furthermore, prior coordination implies that the courier has taken the proper steps to ensure that their actions comply with established security protocols. This may include notifying appropriate security personnel or verifying the logistics surrounding the handling of classified materials while traveling.

By requiring an advanced locking mechanism and coordination, this condition prioritizes the safeguarding of classified information while still providing couriers with the flexibility needed during travel. It highlights a balance between operational effectiveness and adherence to security standards, which is critical when handling sensitive government materials.