Approval and Promulgation of Implementation Plans; State of Arizona; Revised Format for Materials Incorporated by Reference

The Environmental Protection Agency (EPA) is revising the format for materials submitted by the State of Arizona that are incorporated by reference (IBR) into the Arizona State Implementation Plan (SIP). The regulations affected by this format change have all been previously submitted by the State of Arizona and approved by the EPA. This format revision will primarily affect the "Identification of plan" section, as well as the format of the SIP materials that will be available for public inspection at the National Archives and Records Administration (NARA) and the EPA Regional Office. The EPA is also adding a table in the "Identification of plan" section which summarizes the approval actions that the EPA has taken on the non- regulatory and quasi-regulatory portions of the Arizona SIP.