When the senate is in Session all empires vote on the debated Resolution. An empire that's part of the Galactic Council can declare a Resolution an Emergency Measure every 20 years, instantly ending the Recess. When the Recess ends the proposed Resolution with the highest Diplomatic Support will be put in Session.
When the senate is in Recess no Resolution is voted on. The galactic senate is where Resolutions are proposed and voted. When the option to form or join the Galactic Community is offered AI empires will vote with the following weights: If at least 3 empires agree the Galactic Community will be created.
Once an empire that is not Gestalt Consciousness or Fanatic Purifiers has established communications with half of the other empires in the galaxy all said empires will be offered to form the Galactic Community.
