Once upon a time, in a far-off land, there was a kingdom in which the king was fond of history and ancient things. He would collect historical objects, dress in royal threads from bygone eras, and generally try to live ancient traditions.
One day the king issued a royal proclamation, as kings are wont to do now and then. Of course, he wrote the proclamation in the language of 200 years ago, rich in antiquated spellings, obsolete words, now-defunct verb forms, etc.
The general population, of course, could make neither head nor tail of the proclamation. A vast legal muddle ensued. The courts, called upon to untangle the mess, pronounced a ruling that, henceforth, all royal proclamations must be written in modern, currently accepted prose.
In other words, we can't have archaic and edict, too.
Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII