You only get the complimentary pass when you requalify/qualify so if you have a Dec anniversary date you probably got the new NGCI bag tags/card now and might get your pass closer to your renewal date?
I just requalified at the end of October so got my new card and tags as part of my renewal. I guess the invitation might come in a separate mailing and might call them if nothing turns up soon. Today might not be the best day to call QF though