> It does not mean "as long as you never read the original code, whatever you write is yours"
I think there is precedence that says exactly this - for example the BIOS rewrites for the IBM PC from people like Phoenix. And it would be trivial to instruct an LLM to prefer to use (say, in assembler) register C over register B wherever that was possible, resulting in different code.
As long as you never read the original code, it is very likely that whatever you write is yours. So I would not be surprised to read judges indicating in this direction. But I would be a little surprised to find out this was an actual part of the test, rather than an indication that the work was considered to have been copied. There are for instance lots of ways of reproducing copyrighted work without using a copy directly, but naive methods like generating random pieces of text are very time consuming, so there is not much precedence around them. LLMs are much more efficient at it!