honestly noone is going to follow this. just say "FREE TO COPY" "COPY WITH CREDIT" or "DO NOT COPY" Those are the 3 statements are already accepted by the community. saying "TPTCL level X" is never going to take hold and is just a layer if undeeded control. just as easy and cleared to state one of those 3 things.
What do the words copyed and clamed mean?