Sung - Hy uk Park . 2002 . T he Ex tended Projection Principle in the Minimali s t Prog ram . S t ud ie s in M od e rn Gram ma r 27, 1- 35 . The Extended Projection Principle (EPP ), which requires that clauses have subject s, has been playing a central role in Chomsky ' s generative grammar ever since it was proposed in Chomsky (1981, 1982). The EPP, however, shifts from a requirement on clausal structure to a requirement on feature checking in the Minimalist Program, i.e., a feature on the head T of TP. From its inception on to the present , the EPP has had a flavor of oddity in that it is not a principle of its own standing, despite it s name. In Chomsky ' s (1981, 1982) original formulation, the principle is incorporated into the clause- expanding phrase structure rule, whereas in the Minimalist Program, the EPP feature is assumed to be a feature of a feature. All in all, the EPP is largely stipulative and redundant, hence it may be suggested that the principle should be eliminated from the grammar . Proposals have been presented by quite a few syntacticians to derive the EPP effect from some independent principle(s ) and/or module(s) of the grammar . Among these proposals, Bo kovi (2001) seems to be the most promising one. His explanation of the so- called intermediate EPP effect, however, needs some qualification if it is to be true to the basic tenet of the Minimalist Program that every movement is feature- driven.