Though, as said above, I suspect you already have it.
Do you have the red border cover book circa 1989?
Rolemaster: Character Law & Campaign Law
is how most people read the title, but it's actually
Rolemaster, Character Law & Campaign Law
3 books in one. . .which you can tell when you got to the Table of Contents.
If you have an older, just "Character Law" version, that's a different matter.