In order to lighten the administrative burden that occurs when society/state has a legitimate case to prevent offensive naming, society is likely to create an approve list.

Denmark did use to have "These and only these names" and they were written into the law (yes, there are pages and pages of Danish legislation that are just names), but now any non-offensive name is okay, and for administrative purposes, an "approved"-list is kept for easy reference to things that have already been, well, approved.