N18 Beginners Question Box

Thank you.
I mostly didn't want to learn on Ash Wastes, then as the group solidifies we end up getting the newest Core book and getting confused between the two
Not sure how much the rules changes, just don't wanna mix up the group if we change it out.
We made a long list of changes here:
There is an additional rulebook (N24), but it doesn't have nearly as many changes. As a rule of thumb, every book changes something. N23 changes a lot of things.
 
Hey guys!
A question regarding a Parry. It states „if armed with“ for the defender.

So I would like to clarify one point.
For example, I have a two handed champ with 3 melee weapons. Two of them have parry and one not.

If this champ is charged, does he automatically get two parry? Or I am obliged to declare which of available weapons I will use before the charge and therefore he is stuck to this set till the end of his reaction, if he survives the charge?