I understand, but I'm trying to think of another circumstance in which government backdated legislation, retroactively changed the law to make something legal that was at the time illegal. I'm not sure how it's going to stand up in a court of law. More importantly, as it's been raised by many, we're setting a precedent by allowing government this kind of power and accepting this kind of power.
Aside from the issue that's in front of us in particular, this precedent for government to go back in time and retroactively make a thing that was illegal now legal seems on the surface very dangerous.