I found this thread so interesting I decided to research if sticker license plates are legal in Washingto State, inwhich I live. Alas, they are not.
RCW 46.16A.200
License plates.
(5)
(b) The Washington state patrol may grant exceptions to this subsection if the body construction of the vehicle makes compliance with this section impossible.
(7) Unlawful acts. It is unlawful to:
(a) Display a license plate or plates on the front or rear of any vehicle that were not issued by the director for the vehicle;
However, as seen above, the State Patrol can grant and exception (see section 5b). According to an article in our local paper (Bellingham Herald): Using the word “impossible” sounds like a nearly insurmountable barrier. However, the law defines “impossible” in this context as “there was nothing made by the manufacturer ... which would allow the license plate to be affixed to the vehicle ...”
Read more at:
https://www.bellinghamherald.com/news/traffic/rules-of-the-road/article248856249.html#storylink=cpy
Thus, I need to decide if making the appeal to the State Police is worth the effort. Sigh!