Wow, registered for almost two years and you don't know the answer to that question or how or where to look for it?
Remember people, the purpose of the Newbie Tank is for NEWBIES
to ask questions, not that it absolves them from doing a search or reading the FAQ (where a majority of the questions asked here are already answered).
If you've been here long enough to not be considered a newbie, like almost two years, this is just getting lazy.
BTW, here's the link to Importing Airsoft and You from the FAQ section, where you would have found your answer.