The Hassara System is considered neutral territory among the Goa'uld. For this reason, a space station in the Hassara System was chosen as the venue for the summit of System Lords. Seven key System Lords attended the summit: Ba'al, Bastet, Kali, Morrigan, Olokun, Svarog, and Yu. Osiris arrived unexpectedly and joined the summit as the representative of Anubis. The threat of Anubis's increasing power convinced the System Lords to vote in favor of restoring the rank of System Lord to Anubis. Yu was the lone dissenting vote.
Cross Reference: Anubis, Ba'al, Bastet, Jarren, Kali, Lo'taur, Morrigan, Olokun, Osiris, Svarog, System Lords, Tok'ra, Yu
Episode Reference: Summit, Last Stand, Reckoning