I was in Paris and was told by a sale that only 1 Bs or 1Ks per year, while the other sale said every six months. What's ridiculous is that the sale even emphasizied 1Bs, or 1Ks, or 1 Lindys or 1 constance. Other TPFers mentioned that you could ask your family member to buy for you, when I did that, (me and my husband were toghether, we didn't sepearate and pretend we didn't know each other), the sale said couples is counted as 1!!! It really took me by surprise, I asked her if this is a new rule, and she said firmly the rule has been in place for 2 years. Guess I just had bad luck to run into a bad sale on my last day.
It's the same here in the U.S.