That will be next, fisheries own hooks only
You're actually not so far from the truth
Back in the early days of commercial fisheries many had a maximum size hook - usually a 10 or a 12 - presumably to minimise damage to their fish.
As commercial fish got bigger, some anglers wanted to catch these larger fish by using larger baits, but since they were somewhat limited by the hook-sizes available this wasn't always possible - boilies being banned on many waters.
The hook manufacturers spotting a gap in the market introduced the 'wide gape' hook and hooks almost doubled in size overnight.
The fishery owners weren't happy but the angler could show the packet the hooks came out of and it complied with the fisheries maximum size so what could they do. I'm sure one fishery brought in a rule that the maximum gape could be no bigger than a size 12 Kamasan B520 (or a similar none wide gape pattern) although how successful that was - and how they managed to police it - I don't know.
For commercials I just use B611 / B911 the majority of the time and a couple of Guru patterns for the larger sizes
Natural water hooks will be B560 for the feeder, B611 barbed or B520 for the float.
Simon