If the law is knowing but not acting its inconsequential to everything is it not? You can know a million different things and if you don't share them with anybody then so what, or, to what consequence is that knowing for anyone else? Because, for example, the golden rule and the idea of free will are the simplest most all-encompassing laws there are. They're man made , recognized by everyone and finally they deal with people and benefits people, yet by comparison it doesn't matter if you "know the true meaning about right and wrong" because ignorance of these laws (golden/silver rules and the principle of so long as it harms no one do as you will) is not an excuse and cannot be defense but ignorance of natural law by what you say is only consequential to knowing the "true meaning about right and wrong" and because it doesn't express any act, only a "knowing" which is honed as to call it the "true meaning" about "right and wrong" and it doesn't express right over wrong even.
You said "True meaning" and not simply the "meaning of right and wrong" which in itself would imply the not false/true meaning, and just as "the true" is an adjective to meaning it can be an adjective to right and wrong like "the true meaning of the true right and wrong" or the combination of a synonym for true: "the not false meaning of the not false right and not false wrong" and what does it mean to know the meaning of good and bad because what is good and bad for the liar and the thief or for the assassin or the psychopath is not good and bad, right and wrong for the honest man, the psychopath is practicing natural law, as is the desperate, as are the ones that think they know but ignorant of their ignorance, that's if we pretend that it's about "acting based on following what one knows about what is good and bad, right and wrong, morally acceptable" and not only knowing, so in spite of it's specificity as to not false meaning, it won't resolve conflict between two morally conflicting people. what is the law going to do if it was about doing something?