Hi @Susana As @BohZao suggest, by sharing the link for these informations, it is more on a personnal perspective that the members consider more a model than another. We could say this about democracy. The only point is the use of the system itself, we may show a more proper way for it use, but still not a necessity for recognition.

Greeting Asg. well i am not a moderator but i can give you the response: http://www.un.org/en/sections/member-states/about-un-membership/index.html there is all we need to do, be a nation recognized by the UN, and the charter: http://www.un.org/en/sections/un-charter/chapter-ii/index.html i have read and theres nothing saying that it is needed , if is , only in the time of registration of the nation they will request