The period of an international tribunal's temporal jurisdiction is the span of time during which an act must have occurred before the tribunal may consider if the act breached an obligation. There are many questions concerning this particular aspect of an international tribunal's jurisdiction: Does a tribunal have power over acts that occurred after the entry into force of the obligation allegedly breached, but before the tribunal's jurisdiction was accepted? What about acts that began before the tribunal's jurisdiction was accepted but continued after? To what extent can acts before the...