In a previous post Pat wrote...
I am wondering if this is not an "engineering" or "architectural"
issue but is instead really a copyright issue.


Nope! The law reads that documents bearing your seal MUST [emphasis
added] be prepared under your direct supervision.

This is intended to prevent "selling" of a professional seal when the
proper design work as not been completed.

I have seen it happen -- mechanical engineer stamps a drawing of a
retaining wall. no calcs, no letter, nothing to indicate that the
engineer actually did anything other than "sell" his seal. The engineer
eventually lost his license when it became apparent that he had made a
habit of doing this sort of thing.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com