Writing, codifying, a law --NEW TO THE WORLD-- which anticipates every event and condition of necessity, interpretation, and contingency its beneficial intent will said to be applicable and "fair" is difficult, you may have noticed.

Unintended Consequences

So there are none in fact. People revise the language of law to address their experience in detecting violation of such rule as was codified and perforce their dissatisfaction with the "letter" that expresses socially acceptable and unacceptable behavior of the day.

Some people revise law more frequently than others. Some revision of statute appears in whole or in part, perfecting or corrupting, the intentions of reformers and of course adversaries.

This process is what I mean in saying the law is retrospective as it should be.

Diversity is the key to economic and political evolution.