Opening of permanent mission
It is current practice for a Government to inform the Secretary-General of the United Nations, in writing, through the intermediary of its permanent mission in New York, of its intention to establish a permanent mission in Geneva.
The Secretary-General then informs the Director-General of the United Nations Office at Geneva.
The Director-General informs the Chief of Protocol who brings this to the attention of the Head of the Permanent Mission of the host country. The current practice is that a Government informs also the Swiss Government of its intention to establish a mission in Geneva.