Hi Nestor:
No, you do not need to have the CTT+ credential (or any credential, really) to deliver content at a CompTIA Partner organization, other than what that organization stipulates for itself. CompTIA doesn't mandate any level of training for the instructors that work for Partners.
Now, most Partners generally agree that you have to be certified in what you teach - which in a lot of ways is common sense, but there isn't any hard or fast requirement to that end.
CTT+ as a credential, I do believe, is quite valuable and I do hope that CompTIA makes efforts to bring something back into that space. The certification itself, however, was over 10 years old in content and CompTIA felt it wasn't in business interest to keep it going (in terms of curriculum development, expert testing, and such).
Naturally, if CTT+ isn't available to acquire anymore, then Partners can't really mandate it anyway. But Partners have always been at liberty to set their own standards for their instructors.
HTH
/r