A good rule has to be simple but flexible, but not too flexible to create more exceptions than compliance. A good rule has to have a provision to change and even abolish itself if it no longer fits or works. A good rule is universal but adabtable for nuisance.
A good rule lives but is not rigid in its ideology, values, or application. A good rule never needs explanation, reasons or excuses as it is self-evident and self-explanatory. A good rule is what it is, good and something to live by.