Which of the following conditions must be met for a CUE to exist?

A clear and substantial understanding of the criteria for a Clear and Unmistakable Error (CUE) is essential. A CUE exists when an error, which is both clear and unmistakable, significantly alters the outcome of a decision. Thus, the requirement that the error must have changed the outcome had it not occurred is fundamental to establishing a CUE. This means that for a claim to be reconsidered based on a CUE, it must be demonstrated that the originally made decision would have been different if the error had not transpired.

In summary, the presence of a major error that impacts the ultimate decision is crucial to validate a CUE claim, and this understanding serves as the basis for a veteran's right to seek a revision of their claim outcome. Understanding this concept ensures that one can effectively navigate the complexities of VA adjudications and rights, making the comprehension of established procedural criteria critical in ensuring fair evaluations.