The Babel Conference Reception held aboard the Enterprise
The Babel Conference was a Federation diplomatic conference held in 2267 on the neutral planet code named "Babel". In all, 114 delegates, 32 of whom were ambassadors, attended the conference, representing planets including Earth, Vulcan, Tellar, and Andoria. (TOS: "Journey to Babel")
The outcome of the Babel Conference of stardate 3850.3 administered a number of new Federation resolutions towards maintaining peace throughout the region. (TAS: "The Pirates of Orion")
The immediate intention of the conference was to finalize the admittance of Coridan into the United Federation of Planets. Despite several minor quarrels, Ambassador Sarek of Vulcan, who spoke in favor of Coridan's admittance, cast the final vote. (TNG: "Sarek")