This raises an interesting philosophical conundrum. If two pages of code are *identical*, but they have different provenances, can one simply move the license around without having to regenerate the code?
Does libreoffice actually have to delete text and type it all back in again in order for the license change to take effect?
Consider: if two people (A, B) both buy the same CD of a piece of music, then it's legal for A and B to each independently rip the CD to their own PC. It is apparently not legal for A to rip the file, and give B that copy, even though the end result is identical!