This document provides guidance on the statutory and regulatory requirements for states to develop conformity state implementation plans (conformity SIPs). A conformity SIP includes a states specific criteria and procedures for certain aspects of the transportation conformity process. Where EPA has approved a states conformity SIP, the approved conformity SIP governs conformity determinations instead of the federal transportation conformity regulations (or conformity rule), for those aspects of the rule that it addresses and that are applicable. This guidance document describes the new requirements for conformity SIPs, so that state and local agencies can prepare an approvable conformity SIP. This guidance document also covers what requirements apply for conformity determinations that occur before and after conformity SIPs are approved. This guidance supersedes EPAs November 2004 conformity SIP guidance1 and the portion of the February 2006 interim SAFETEA-LU guidance related to conformity SIPs.

Title from title screen (viewed Feb. 12, 2009). "January 2009." "EPA-420-B-09-001." Appendix B is on a World document accessible from the website. Includes bibliographical references.

This document provides guidance on the statutory and regulatory requirements for states to develop conformity state implementation plans. This document supersedes the November 2004 Conformity SIP Guidance and Section 7 of the Interim Guidance for Implementing the Transportation Conformity Provisions in the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) (February 2006).