That’s a good question. I’m wondering how they can provide the "Discover Nitrox" portion as possibly being the actual dive but still state "NITROX REQUIRED". I’m not Nitrox certified yet either but I’m guessing that they will limit your dives because of the lack of certification and the extra dive-time limitations of diving with regular air. Be sure to have them spell out the details before paying for and committing yourself and ending up disappointed. Good luck!