Introduction 1
GHG Reporting in the United States 2
Terms and Definitions Used by Registries and Regulatory Frameworks 3
Scope of This SOP 4
Engagement Acceptance Considerations 5
Independence 7
Adequate Knowledge of Subject Matter and Use of a Specialist 7
Considerations When Selecting and Using the Work of a Specialist 11
Criteria 12
Attributes to Be Met by GHG Emission Reductions 13
Materiality 15
Uncertainty in the Measurement of GHG Emissions 15
Consistency 16
Boundaries 16
Scopes for Reporting GHG Emissions: Direct and Indirect Emissions 17
Baselines 19
Objective of the Engagement 19
GHG Inventory 19
GHG Emission Reduction Information 20
Written Assertion by the Responsible Party 23
Engagement Performance 23
Agreement on Engagement Terms 23
Planning the Engagement 24
Part of Attest Engagement Performed by Other Practitioners 27
Attestation Risk 27
Obtaining Sufficient Evidence 28
Consideration of Subsequent Events 34
Adequacy of Disclosure 35
Representation Letter 36
Reporting 38
Attest Documentation 41
Effective Date 41
Appendix A—Glossary 42
Appendix B—Sources for GHG Emission Protocols and Calculation Tools 48
Appendix C—Illustrative Management Representation Letter 50
Appendix D—Illustrative Examination Reports on GHG Emissions Information 53
Appendix E—Illustrative Examination Reports on GHG Emission Reduction Information 56
Appendix F—Illustrative Review Reports on GHG Emissions Information 59
Appendix G—Illustrative Review Reports on GHG Emission Reduction Information 62