Specializations will be unlocked when?

According to an ad on Xbox Live gamers who play Halo 4 before the 20th will have access to other specializations than the two that come default. As according to said ad is that an email will be sent with a download code. so my questionis when will this emailbe sent?

Woah where is the source for this? I didn’t know about this.

> According to an ad on Xbox Live gamers who play Halo 4 before the 20th will have access to other specializations than the two that come default. As according to said ad is that an email will be sent with a download code. so my questionis when will this emailbe sent?

The fine print says you will be emailed the code by the end of the month.

> > According to an ad on Xbox Live gamers who play Halo 4 before the 20th will have access to other specializations than the two that come default. As according to said ad is that an email will be sent with a download code. so my questionis when will this emailbe sent?
>
> The fine print says you will be emailed the code by the end of the month.

But where is the ad for it? And also, this is for EVERYONE who plays before the 20th right? So I should be getting it too?