Gaz - mind if I add one?

Document any updates, additions, or other modifications to the code with a full description, who did it, and when.

The reasoning should be obvious, but to some may not. Any introduction or addition of new logic by another person might change both the paradigm and the "cleverness" of the code. And sorry to say it, a new introduction to the code may be a kludge some by one who did not understand the masterpiece, like a band-aid on a Rembrandt.