All players must always abide by all the rules then in effect, in the form in which they are then in effect. The rules in the Initial Set are in effect whenever a game begins. Initially rules in the 100's are immutable and rules in the 200's are mutable. All rule-changes proposed in the proper way shall be voted on. They will be adopted if and only if they receive the required number of votes.
Every player is an eligible voter.
Every eligible voter must participate in every vote on rule-changes. All proposed rule-changes shall be written down before they are voted on. If they are adopted, they shall guide play in the form in which they were voted on. No rule-change may take effect earlier than the moment of the completion of the vote that adopted it, even if its wording explicitly states otherwise. No rule-change may have retroactive application.