We develop a theory of movement operations that occur after the syntactic derivation, in the PF component, within the framework of Distributed Morphology. The properties of syntactic movement have been studied extensively in linguistic theory, both in terms of locality conditions and in terms of the types of constituents affected (phrases, subparts of phrases, heads). Despite differences in particular analyses or frameworks, the locality conditions on movement operations are a central concern of current research. Here we address movement operations as well, but operations of a different type. In particular, we examine and analyze movement operations that occur after the syntactic derivation, in the PF component, and provide a theory that makes proposals concerning (a) the locality conditions on such movements, (b) the types of constituents they affect, and (c) the position of such operations in the sequential derivation from the output of syntax to phonologically instantiated expressions.From a somewhat abstract perspective, the fact on which we base our study is that not all structures and strings are the result of operations that occur exclusively in the syntactic component of the grammar; this observation stems from a body of prior research investigating the relationship between syntactic structure and phonological form. The observation covers two domains: one dealing with linear sequences that are syntactically opaque, the other with movement operations. In the first domain it has been demonstrated that the internal ordering of clitic clusters cannotWe would like to thank