You are correct except the examination should be ALL official documents that are unsigned
I maintain that none of the documents are signed and therefore, there are no official Biden Administration documents
There is also the issue of compos mentis. In the face of the DOJ decision that he wasn’t culpable on the classified documents case, I would think he might have to prove Compos Mentis to sustain the documents signed during at least the period of his administration after the DOJ determination of incompetence.