First, the RISC-V Consortium is an organization (now) based in Switzerland. Second, there is literally nothing anyone can do to stop you from making a RISC-V core, short of calling it "RISC-V". For that, you have to pass a few tests, but all trivial stuff for a serious contender.
On a related note, I don't think it's an accident that Apple almost completely avoids talking about "Arm" but instead calls it "Apple Silicon".
You can't sanction public knowledge. The mere idea of such should be ridiculed.