This report responds to requests from Chairman Edward Markey, for an analysis of a 25-percent Federal renewable electricity standard (RES). The RES proposal analyzed in this report is included in the discussion draft of broader legislation, the American Clean Energy and Security Act (ACESA) of 2009, issued on the Energy and Commerce Committee website at the end of March 2009. The analysis presented in this report starts from an updated version of the Annual Energy Outlook 2009 reference case that reflects the projected impacts of the American Recovery and Reinvestment Act (ARRA), enacted in February 2009, and revised economic assumptions.

Contents	complete report
Preface and Contacts
Executive Summary
Introduction
Background
Analysis Cases
Results
Uncertainties
Addendum
Note: The regional compliance slides posted below have been updated from those posted on April 27, 2009.  The analysis results and the regional compliance mixes are unchanged, but the regional targets shown on the slides now properly reflect the exemption for small retailers and existing hydroelectric eneration based on regional data.  The earlier version of these slides had shown regional targets calculated using national average data for the shares of existing hydroelectric generation and sales by small sellers.
Regional Compliance Mix - RESFEC Case (Full Efficiency Credits)
Regional Compliance Mix - RESNEC Case (No Efficiency Credits)
Appendixes
Appendix A: Follow-Up Analysis Request Letter
Appendix B: Analysis Request Letter
Appendix C: Discussion Draft
Yearly Tables
Updated AEO2009 Reference Case
Regional Compliance Mix - RESFEC Case (Full Efficiency Credits)
Regional Compliance Mix - RESNEC Case (No Efficiency Credits)