Licenses are permissions to use a privilege which some legal rule (e.g., copyright) makes exclusive. You don't need a license when a work is out of copyright.
Its funny to be relying on copyright licenses when what people really want to to do is rewrite the law, but that's a different issue.
I'm saying the copyright on the license will expire, at which point the parts of the license that rely on its own copyright will no longer be enforceable.
Its funny to be relying on copyright licenses when what people really want to to do is rewrite the law, but that's a different issue.