Is anyone disputing that as a fact?

Yes, it is disputed.

Not according to The Professor, The All-Knowing. He says that the government is challenging the legislation.

Not all knowing. Not being a constitutional lawyer I do not even have an opinion on the possible outcome, and am in awe of those who knew for certain even before there was any question of a court case.

I did not say what the government was challenging, I quoted their actual case as put to the hearing.