Mass Effect 3 N7 Collectors Edition DLC Codes?

I've just preordered ME3 N7 edition, and it comes with unique codes to get extra content, but there's a reason why I'm worried about these codes, Bioware games use EA codes a lot for there DLC which is really irritating, as my Gamertag is linked to the wrong EA account and I can't unlink it, which is stupid. So I'm just wondering, will the DLC codes be 25 digit XBL codes? Or overly complicated 20 digit EA codes which I won't be able to use