(written from a Production point of view)
According to the "It's Federation Day!" newspaper clipping created for Star Trek Generations, Natha Kell was the Tellarite ambassador to the signing of the Federation Charter on October 11, 2161. Prior to the conference, he was involved in some type of dispute with Ambassador Sarahd of Andoria. He was famous for declaring that "We defy anyone, even the Romulans, to test our resolve now for collective security."