If a guy is allowed 6 halibut a year, and for simplicity sake lets say half of those can be 115 cm or less and the other half have to be 83 cm or less, why not just add up all the weight cumulatively and allow people to catch their limit in total weight? So lets say a 115 cm halibut weighs 40 lbs, and an 83 cm halibut weighs 15 lbs, then the total annual limit for an angler is 165 lbs. If you want to harvest a 100 lber, go ahead, but you only have 65 lbs left. Provide a simple length vs weight conversion that everyone has to work from. You'd also still have to record your catch so that there's proof of what you caught and you could still only keep one a day, or two possession.