If you read every page from 19 the begining of the Freshwater rules to the end of the special rules page 87 the defintion is not there. You have to refer back to page 15 definitions. It would make more sense to have all the definitions contained in each area Freshwater, Marine etc. 120 pages of regs to read and remember. I have a copy in every vehicle,trailer boat etc I own and read the regs for the area I plan to fish before I get out of the truck or into the boat just to make sure I have it down. I have been fishing and hunting in this state for 40 years and have yet to meet a game warden in the feild. I think the average guy just says to heck with it knowing they will most likely never get caught. The rest just assume.