Every photo will be AI-enhanced and correctly labeled as such.

Just like every Web site has a cookie warning.

> If the latter, just penalize the listing agents. Trivial.

It's very unlikely to be trivial though because the state typically lacks the resources required to enforce things like this at scale. You'll need to find violators, meet a burden of proof that they violated the law, notify them, give them the right to defend themsleves against the allegation, etc.

They'll almost certainly spend more time and money on the process than is ever collected if this ever happens.