This final action revises the applicable implementation plans concerning the PSD program mandated by part C of title I of the Clean Air Act (CAA or Act). These revisions incorporate newly promulgated paragraphs of the Federal PSD rule into the federal implementation plan portion of a State's implementation plan where the State does not have an approved PSD State Implementation Plan (SIP) in place. Specifically, the revisions incorporate new applicability provisions in the Federal PSD rules for baseline emissions determination, actual-to-projected- actual methodology, plantwide applicability limitations (PAL's), clean units, and pollution control projects (PCP's). The changes are intended to ensure comprehensive and consistent implementation of the Federal PSD program by State, local, and tribal agencies where EPA has determined that they have the responsibility to implement the Federal PSD program.