Frozen Ever After - When will FP+ open and will the new A&E meet and greet be tier 1?

When was first point in there that they starting allowing FP+ for 7DMT? Or was it the old FP system at that point? Well, if so, when did they start allowing old FPs in the time frame.

Definitely the new FPP system, but as I didn’t have a trip planned at that time I wSnt really paying attention.