E-mail them 3 times and you get 3 different answers.
When the "can an infiltrating character give his USR to another unit and let them both deploy as infiltrators at the begin of the game" was hot in 5th some people I know personally sent it in (I wanted to know if Karandras or Illic can deploy on first turn infiltrating together with Wraithguard).
We received an fun amount of replies. We had yes, no and a few answers in between some suggesting to roll a dice.
Are they all considered official now and I can choose which one I like?