There is already a trademark-based restriction on the name Java. You can't call your system Java unless it passes the TCK. You can't pass the TCK without signin

There is already a trademark-based restriction on the name Java. You can't call your system Java unless it passes the TCK. You can't pass the TCK without signing some sort of license about what your implementation can and can't do. TeX has the same concept with the TRIP test.