New rules on 2257

[The Other Steve]

I think that there is an effective date and that is the date that the AG - or his appointed officer - signs off on the new regulation.

That date will be announced in the government gazette - or whatever the official US government publication is called.

And as someone pointed out - it's not easy to challenge a regulation in court. In fact if someone is charged under this regulation the court will probably not be allowed to consider the fairness or constitutionality of the regulation.