There's catch limits on most everything. I don't really have a problem with diving catch limits [but hell, I've never taken more than 2 a day diving anyway!].
I'd actually be really interested in seeing how they inforce it. If Bushman & I go out; dive for lobsters then check the traps, how do they know which we got diving and which we got trapping???
Oh... FYI. When Rick says from the tip of the Cape down, he's referring to the outside [ocean side] of the cape. And you can't have a permit 5" exemption permit and a 'regular' permit. e.g. if you have a permit for the backside of the cape, and you choose to sign up to take larger lobsters; you're license isn't valid in the areas that have the 5" max restriction...
Rick... next time you pull 20; give me a call and I'll get the other 10 on shore for you... and I'll only charge you 5 or 6 bugs!