Unless I am mistaken, no class/race combo that requires unlocking can be the founder of a legacy. Is that correct? For instance, I could never start a legacy based on a Chiss Sith Warrior because you have to unlock Chiss before you can make them as Sith, and that requires either a level 50 Chiss in something else, like BH or IA, or you have to have a basic legacy with a level 30 character and then buy it on the cartel market.
Please correct me if I am wrong, I really hope I am....
TB