Laws of the country are one thing, the greater good for the dog is the other. I got my puppy from Slovakia in her age of 6,5 week. I do not know, if they have any EXCEPTIONS, but I wanted the puppy young, the breeder agreed and so it happened. The pup was perfectly socialised by the breeder, the rest was done with me.
I did not notice any harm on the puppy, except that she is way too friendly with all people all the time!