Nope, on Jan 6... Federal statute gives a path(suggestion) to resolve two submitted slates submitted without contest to the slate ascertained with the Governors seal.
But if the slates are contested... the supreme law of the constitution ultimately gives plenary authority to congress and the president of the Senate, Pence, to decide which EC delegate slate will be counted.
Uh, what day is it? Man there are so many twists and turns in this it’s like a Clancy novel.