selkirk develops an explicit account of how f-marking propagates up syntactic trees. accenting indicates f-marking. f-marking projects up a given syntactic tree such that both lexical items, i.e. terminal nodes and phrasal levels, i.e. nonterminal nodes, can be f-marked. specifically, a set of rules determines how and where f-marking occurs in the syntax. these rules are shown in (1) and (2):