Last summer I was in NE Iowa on vacation. Had a DNr guy stop and ask if I was fishing.
Showed him my liscense and all. Also showed him a "fly" I tie with soft plastic luminescent beads and a sivler 00 blade.
He said it was a lure. Since he would write the ticket that I would have to pay I did not use it on any fly only water.
It may be more important what the "Game Warden" thinks that what we determine.

Rick