As a minimum, how often must the combination on padlocks be changed for classified storage?

Changing the combination on padlocks used for classified storage is a critical security measure designed to protect sensitive information. The requirement to change the combination annually reflects the need to maintain security without being overly burdensome. Performing this change at least once per year helps to ensure that the access code does not become compromised over time, which is vital in safeguarding classified materials. Regular changes diminish the risk of unauthorized access, particularly in environments where personnel might change frequently, and different individuals may have access to the storage area.

While greater frequency such as monthly or quarterly would enhance security, the established standard dictates that an annual change is sufficient to mitigate risks while balancing operational needs. The semiannual option is also less stringent than required, making the annual change the most appropriate choice in aligning with established security protocols for classified storage.