Trolling large sub-surface plugs (such as Rapala ‘Magnum’ or Halco ‘Laser Pro’ lures) is an extremely productive technique for many species. However – after years of experimentation – when fishing for large predators that can easily engulf the entire lure, I prefer to remove the treble hooks and attach a large circle hook to the ring at the head of the plug, because I find that it gives cleaner hook-ups that enable me to release the fish easier, safer and in better condition, rather than foul-hooking the fish in the face, gills and other parts of the body. Is it legal by IGFA rules to remove the trebles or assist hooks from a lure and attach a single hook to the front of it?