415.4. Players must track their own resources such as XP and unspent Energy/Power they have floating. They are not required to be written down, but they must be represented in a way that is clear and understandable to all players, such as with dice or counters.
415.4.a. Resources being immediately spent need to be communicated, but do not need to be tracked in this way.
415.4.b. If any player notices a resource discrepancy, they must immediately make all players aware of it. If it can't be resolved easily by the players, a judge must be called.