I'm not able to find anything about this. I guess this is something that might have been said on the meetings/banquets. But if the rule applies, Huslia is not eligible for 8hours mandatory rest, it's quite far away from Yukon.. and they already have more options than usual.
I don't know.
It seems to me that many who took 8 in Tanana had plans to take 24 in Huslia or Galena, but choosed Galena. That's of course only guessing.