The "sport" exception is interesting. It presumably is aimed at rapier & sabre fencing, but it should cover just about any martial art with a weapons for, no? Iaito, bando, escrima, selat, etc., etc. What does paragraph 1(r) describe?
Also, I wonder how much "activity" is required in order to be considered "sporting activity?" Maybe if you put on warm-ups and take your swords out back or down into the cellar and swing it a few times you are OK. Specify in a sale that it is for use in "sporting activity." Vague language is a two-way street, fortunately.