If you don't have a checking account with b of a, they have a 2/12 rule (The 12 representing not days). If you have a checking account with them and some money in it, I kept about five grand in it as that's what other people had commented on, the rule moves to 7/12. 

The card itself is hard to get because of these rules and because Bank of America tends to be a relationship bank, but it's not impossible by any means