The paper describes at length and then discusses critically Frederick Schauer's analysis of rules in his recent book Playing By the RuZes. For most of the book Schauer discusses rules in general, and only at the end talks about legal rules in particular. The chief message of Schauer's analysis is that rules permit, and even constitute, a particular kind of decision‐making, one that quite deliberately insulates the decision‐taker from considerations of what would be in the circumstances the best justified decision (...) to take. Rules are thus for Schauer devices for the allocation of decision‐making power: The effect of A delegating to B the power to decide by a set of rules devised by A is that A retains much control over B 's decision‐making. Schauer canvasses the claims of what he calls “presumptive positivism” to be a theory of law which embodies such a view of legal rules. In his criticism, the author compares Schauer's view with Joseph Raz's notion of legal rules as exclusionary reasons. The author then compares “presumptive positivism” with some other recent versions of positivism and the idea of rules as devices for the allocation of power with theories of law in the Critical Legal Studies movement. (shrink)