My thoughts;
Given that this has been attempted twice before (see above) we need to find out how serious this actually is – is it a mistake or a genuine backdoor attempt at getting rockclimbing banned.
Why would CALM want to ban climbing? Insurance, liability?
And how on earth does whoever is pushing it think they are they going to enforce it? Does CALM really have the resources?
A point about abseiling, it is mostly (only?) commercial and therefore, I suspect, actually in the interests of the commercial operators to have this ruling – reduces their competition.
Climbing is completely different to this. People just go with their own gear. Numbers of parties are much bigger for climbing than for abseiling. It is all much more casual with only petrol money passing hands.