All players must always abide by all the rules then in effect, in the form that they are then in effect. The game begins with the rules from the Initial Set in effect. The Initial Set consists of Rules 101-116 (which are immutable) and 201-213 (which are mutable).

Rules have properties. Other rules may add additional properties for rules along with said properties’ default values, so long as said properties do not contradict the properties defined in this rule. A rule’s number is a natural number used for reference. The set of rules currently in effect shall never contain multiple rules with the…