If I had to come up with an objective rule for defining swimbaits for this tournament I would say any bait that displaces as least as much water as a 8" huddleston is in. That would allow the lunker punker, and even senkos if someone poured a 1 inch diameter monster. Call it a "big bait" tournament.

The one unfortunate exception this would rule out is a few bluegill imitations. The Mattlures bluegill is by any definition a swimbait and probably even a "big bait" due to the large profile, but it doesn't displace enough water to fit in above. I can't think of any other exceptions besides bluegills, though.

This would purposefully disqualify baits such as 5" mission fish, basstrix paddletail tubes, swim doctor, etc... I would make all attempts to leave out small swimbaits of any kind. When you have a swimbait shaped that close to a plastic worm this could quickly degrade into a worm dragging competition with watermelon-red mission fish.