I don't like paltry sums like this. $300 is a significant financial impact to someone who's barely making ends meet, and absolutely nothing at all to a billionaire. "If the penalty for a crime is a fine, then that law only exists for the poor."
Make it a tiny % of net worth, with a modest minimum and watch EVERYONE obey. Or at least something meaningful to everyone, or don't make it a fine. Use some other carrot or stick.
But that makes wildly different incentives to enforce, depending on the target. We all know this stuff is all about revenue enhancement, and in that capacity, the targets will become the whales.