What is the definition of one-time access in personnel security?

One-time access in personnel security refers to a specific authorization that allows an individual to access sensitive or classified information temporarily, often without undergoing a full security clearance process. This type of access is typically granted for a particular mission or task, rather than being a permanent entitlement to the information.

The reasoning behind this definition is that it provides flexibility in personnel security while still maintaining adequate control over sensitive information. It allows organizations to bring in experts or personnel who may not have a full clearance but need access to specific information for a limited time. This ensures that security protocols are upheld while facilitating operational effectiveness.

The other choices don't align with the proper definition. Permanent clearance involves ongoing checks and approvals, and implying a lifetime of access is not how one-time access operates. Additionally, while an upgrade to security clearance could potentially relate to extended access, it does not define one-time access, which is inherently about limited, task-specific permissions.