is Vulcan's ambassador to the
STIII: The Federation has a President and a Council.
STV: A joint Klingon-Romulan-Federation "planet of peace" in the Neutral Zone did not work out very well.
STVI: The Klingon Empire and Federation have been at odds for seventy years. Azetbur bitterly describes the Federation as a "homo sapiens only club." The Klingon Empire is led by a High Council, chief among them the Chancellor.
There appears to be a Neutral Zone between the Federation and Klingon Empire as well.