This memorandum is to provide guidance to Federal agencies as to their implementation of the NEPA. This memorandum includes an overview of NEPA, including a discussion of recent amendments to the statute and recent case law as relevant to agency implementation of NEPA. This memorandum also provides guidance for agencies to use when establishing or revising agency specific NEPA implementing procedures. As part of this guidance, CEQ has provided a template that agencies are encouraged to follow for such NEPA implementing procedures, attached as Appendix 1. This guidance and the associated template are intended to be used by agencies that routinely undertake, or anticipate undertaking, actions subject to NEPA.