 Of course, a further premise is needed for this argument. This is that it will not be impossible or severely difficult to duly compensate those non-outlaw agencies and individuals for interference with their own protective activities and, hence, their claims against such interference do not acquire the force of claims protected by property rules. (If the claims do acquire that force, the anarchist correctly condemns the dominant association’s interference with those agencies or individuals.) To support this further premise, Nozick needs to survey the conditions that do made it impossible or severely difficult to supply due compensation for boundary crossings. A boundary will have the force of a claim protected by a property rule if and only if such a condition is present. Much of the intricacy (and opacity) of ASU’s chapter 4 resides within this survey.