Which of these statements about COMSEC procedures is true?

The statement regarding combinations must be documented for accountability is accurate. This practice is crucial in COMSEC procedures, where maintaining the security and integrity of classified materials is paramount. Documenting combinations helps ensure that there is a clear record of who has access to specific secure storage and equipment. This accountability prevents unauthorized access and allows for tracking any potential breaches or security incidents, reinforcing a culture of responsibility and vigilance among personnel handling sensitive information.

In a secure environment, it is vital that only authorized individuals have access to sensitive materials. Documenting combinations establishes a formal process for tracking access and can facilitate audits or investigations if needed. Without proper documentation, there could be ambiguity about who has access or who is responsible for certain secure items, leading to potential security risks. Thus, the correct statement aligns with the principles of secure practices required in COMSEC.

The other statements lack adherence to these principles. For instance, sharing passwords among users can lead to a significant security risk. Spot checks are an essential part of COMSEC procedures and should never be skipped, regardless of previous checks. Additionally, local custody files must typically be maintained by specific authorized personnel, adhering to strict guidelines, rather than being created by anyone in the organization.