[pluvmantelo]

From UNSGselection.org faq:

Traditionally, candidates from the Permanent Five members of the Security Council (China, France, Russia, the United Kingdom, and the United States), are not considered for the position of Secretary-General to avoid further concentration of power within the UN. As with regional rotation, this is a matter of precedent and convention, rather than a written rule.

[SaveFerris]

Excellent find. Good work.

[The Mayor]

Thanks for the link