It isn't defined what it means for a version to be "authorized" though, which means it is ambiguous. And the FAQ for the original OGL makes it pretty clear that

It isn't defined what it means for a version to be "authorized" though, which means it is ambiguous. And the FAQ for the original OGL makes it pretty clear that that intent was that once a version is authorized, it can't be un-authorized. As a layman, non-lawyer that seems like a pretty tough argument for WOTC.