The Kable doctrine is, and has always been, a difficult legal principle to define. For over a decade, and despite much academic attention, it had little consequence for state power. Until recently, the High Court deftly avoided its application by employing a number of techniques. As the politics of law and order in the states have increased, state Parliaments have felt emboldened by these cases to test the outer limits of their legislative power. In such an environment, federal anti-terrorism measures, introduced as extraordinary responses necessary for the exceptional nature of terrorism, have crept into general state policing and expanded. It is in this arena that the Kable doctrine has emerged once again. The principle is now vital to un...