Future steps with respect to how the newly prohibited firearms would be treated have not been determined at this point.
I would remind you, though, when the May 1 OIC came into effect, there was an amnesty order. That gave lawful owners an opportunity to either dispose of their firearms or, otherwise, come into compliance with the new law.
They have a period of time during which they are not subject to criminal liability for unlawful possession, and then a decision would be made by the government as to how to move forward with the treatment of any newly prohibited firearms that would be included in this amended definition.