From the beginning of the minimalist program, many researchers have sought the key to the Extended Projection Principle. It was treated as the satisfaction of the strong feature checking of T or Agr (Chomsky 1993, 1995), as the universal requirement of thematization of the subject, or as a side effect of Case feature checking (Martin 1999). On the other hand, Collins (1997) claims that the EPP simply requires that some material occupy the position of Spec-T. On the way of his argumentation, he shows that Locative Inversion (henceforth LI) is a representative case of the EPP satisfaction. Since then, LI has been in the center of debate concerning the nature of the EPP. In this paper, we will show that a is driven by defective feature checking/Agree not for the mere EPP satisfaction. Thus, the approach we take in this paper supports the view that the EPP is not an independent requirement but is closely related to feature checking/Agree.