1.1 ,Purpose—,The purpose of this guide is to provide a series of options or instructions consistent with good commercial and customary practice in the United States for environmental liability disclosures accompanying audited and unaudited financial statements. This guide is consistent with Generally Accepted Accounting Principles (GAAP)2 issued by Financial Accounting Standards Board (FASB), as well as related statements, rules, regulations, and/or procedures issued by Government Accounting Standards Board (GASB), Public Company Accounting Oversight Board (PCAOB), Securities and Exchange Commission (SEC), and Federal Accounting Standards Advisory Board (FASAB). This guide is intended to be consistent with other issuers of accounting standards and practices, including International Accounting Standards Board (IASB).