New rules are introduced to Bartok by the winner of each round, making the game more complex as it progresses. The creator must tell the other players what this rule is. Rules cannot be specific to particular players (such as "skip Bill every turn") and cannot remove or alter a rule introduced in a previous round, unless that is the wish of every player. Additionally, if there is a unanimous veto, that is, "every" player bar the creator vetoes a new rule, then the rule is not used and the creator must think of another. Commonly there is a time out rule, whereby if players need clarification during a round of a newly introduced rule they may call time out and discuss it.