I'm trying to understand how throwing the carcass of a cleaned fish back into the water of the lake where it lived and would have died and decomposed naturally could be against any law or regulation? I guess said regulation would break the law of good common sense.
Many marinas will not allow it in their harbor. Even ones with fish cleaning stations. Simple reason is the dead fish carcasses tend to stink an look bad when they are floating around or wash up on shore. In my experience most of the issues in regard to floating dead stinking fish at boat ramps tend to come from the bow fishermen. They love to pile hundreds of pounds of dead carp and gar right at the boat ramp. I guess its their way of showing off.