I can only tell you my story.
This past December was the first time we owned and activated APs.
It was our first day and we went to MK. My DH couldn't come with us. He was going to meet us later on.
When I got to MK, I started to panic because I realized I had my DH AP and we hadn't activated them yet. I thought for sure they wouldn't let me activate my DHs.
Well, I went to Guest Relations and the CM told me "no problem" and he activated mine, my DH's and my 2 DD's with only my giving him the info to activate them.
Hope this helps!