The Plenary Council was a summit meeting held in 2293, gathering leaders and representatives from around the planet Mestiko to discuss the planet's potential petition for membership into the United Federation of Planets. The Plenary Council was chaired by Jo'Zamestaad Raya elMora, and also in attendance were Federation Ambassador Spock, and Klingon Chancellor Azetbur. (TOS eBook: Mere Anarchy: Its Hour Come Round)