10 business days from today is Dec 19th.
What are the rules in other states; I think time has run out on challenges, correct?
(Need link to that thread where you saw the “10 business days”)
http://www.usatoday.com/story/news/politics/elections/2016/12/05/florida-voters-sue-recount/95021946/
About half way down the story is this quote:
But even lawyers for the plantiffs acknowledge time isn't on their side. Clint Curtis, an Orlando attorney representing the plantiffs, said the defendants may not respond by the time the Electoral College meets on December 19th.
"They can ignore it entirely," He said.
As specifically for the "10 business days" someone had asked for clarification in the comments on why the State didn't have to respond by December 19th, and several responses said that Florida law states they have 10 business days to file a response.