I was reading Huw Millington's review of set 70700 Space Swarmer on brickset, in which he states:
The box is almost square and this being from the USA, like all US boxes but unlike European ones, it states the number of pieces on the front. I'm guessing that it's some sort of requirement to do so in the USA, but I wonder why LEGO don't print it on European boxes. It's useful information for the consumer, after all.
Which I think is a very valid question.
Are there indeed such requirements in the USA? Are there other countries with similar requirements?
And I guess this will be harder to answer, but why doesn't LEGO just state it on all boxes anyway?