FASB Accounting Standards Codification, The FASB Accounting Standards Codification simplifies user access to all authoritative U.S. generally accepted accounting principles (GAAP) by providing all the authoritative literature related to a particular Topic in one place. The term authoritative includes all level A�D GAAP that has been issued by a standard setter. The content in the Codification is organized by Topic, Subtopic, Section and Subsection. The Codification includes accounting standards issued by the Financial Accounting Stand.