I believe different states say different things. One example as 40 @ 28". That one is pretty specific and can be enforced, maybe. Nothing at all says that the numbers on the bow have to be correct. If I build a bow and write 100 # on my 70 pound bow ( as I read Fred B once did), what law did I break?
Some say 40# at your draw length and some just say 40#. ( of course, the actual poundage is different from state to state.
Most of the regulators that come up with these rules don't know anything about the actual sport and they get their info , hopefully, from state clubs or ranking sportsmen. However, often, in spite of a good try, the written rule just doesn't come out right.
An example might be seen in Wisconsin's rule about broadheads ( if it is even still in the books as such) stating something like..steel broadheads must be sharp. Says nothing about plastic ones, or more importantly, stone, or heck, titanium even.
I think if you are close, you should make the effort to do something to ensure a non trad warden who is checking you in the field feels comfortable with your choice. Know your stuff and be confident about it. Or, just boost up just a bit so you are not right at the minimum.
ChuckC