Which of the following describes an Enduring Exception?

An Enduring Exception refers to a special circumstance in which a particular requirement cannot be met due to specific constraints, making remediation infeasible. This concept recognizes that while compliance is generally sought for cybersecurity standards, there may be unique situations where the strict application of certain requirements is impractical or impossible. In such cases, the organization may document the exception, detailing the rationale behind it and potentially outlining any compensating controls that are in place.

The other choices describe different situations related to compliance and operational standards, but they do not accurately define an Enduring Exception. For example, full compliance with no exceptions and an operational plan for remediation do not account for instances where remediation is simply not feasible, which is the crux of an Enduring Exception. The option referring to a situation that applies to all CUI processing assets is also broader than the specific scenario that an Enduring Exception encapsulates.