The alignment in Laki (Northwestern Iranian) follows a split ergative alignment. We argue that this split arises due to the presence of a single locus of Agreement on T in past intransitive and present clauses, versus two loci of Agreement on T and v in past transitive clauses. In past transitive clauses, when there is no accessible argument due to locality, the Agreement on T is realized as default. We suggest that the accessibility of an argument for T agreement in past transitive clauses depends on a PF constraint that bans the adjacency of two clitics. This proposal raises interesting questions about the nature of PF constraints and their interaction with syntax.