Generally, that would be correct. I'm not speaking for all civil law jurisdictions. But for those that take the monist approach to international treaties, that would be correct. The entire treaty, including article 21, would become part of domestic law in such systems. Germany, for example, has a provision in its constitution that any time Germany ratifies a treaty, that treaty immediately becomes binding law domestically.
On November 19th, 2013. See this statement in context.