There are a number of bats, including 6 from Worth, which were ruled illegal at the end of July of this year. One of the bats is the 3DX. However, you should note that Worth makes several bats which include "3DX" in the model number. The one which is illegal is simply "3DX", not "3DX Fastpitch" which is what I have seen girls around here using. The 3DX which is banned, along with the other 5 Worth bats which were banned, are all slow pitch bats. To see a list, go to www.softball.org, then click on site map, certified equipment, and bats. If you happen to have a bat that is on the banned list, you can send it back to Worth for recertification. For instructions, go to www.worthsports.com. Hope this helps.