The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Florida State Implementation Plan (SIP), submitted by the Florida Department of Environmental Protection (FDEP), Division of Air Resources Management, to EPA on December 19, 2013. The SIP revision modifies Florida's New Source Review (NSR) Prevention of Significant Deterioration (PSD) permitting regulations to provide FDEP with the authority to issue PSD permits governing greenhouse gas (GHG) emissions, to establish appropriate emission thresholds for determining which new stationary sources and modifications to existing stationary sources become subject to Florida's PSD permitting requirements for their GHG emissions, and to facilitate the implementation of GHG Plantwide Applicability Limits (PALs) by allowing consideration of GHG PALs in determining whether GHGs are "subject to regulation." The changes to Florida's regulations also update Florida's SIP to incorporate provisions addressing issuance of GHG PALs on a carbon dioxide equivalent (CO<INF>2</INF>e) basis. EPA is taking final action to approve Florida's December 19, 2013 SIP revision because it is in accordance with the Clean Air Act (CAA or Act) and EPA regulations regarding the PSD permitting program. Concurrent with this final approval, EPA is rescinding the GHG PSD Federal Implementation Plan (FIP) for Florida that was put in place on December 30, 2010, to ensure the availability of a permitting authority for GHG permitting in Florida.