This excerpt taken from the AN 10-K filed Feb 17, 2010.
The FASB Accounting Standards Codification and the Hierarchy of Generally Accepted Accounting Principles
In June 2009, the Financial Accounting Standards Board (FASB) issued The FASB Accounting Standards Codification and the Hierarchy of Generally Accepted Accounting Principles, which establishes the FASB Accounting Standards Codification (the ASC) as the source of authoritative principles recognized by the FASB to be applied by nongovernmental entities in the preparation of financial statements in conformity with generally accepted accounting principles (GAAP). Rules and interpretive releases of the SEC under authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. This standard is effective for financial statements issued for interim and annual periods ending after September 15, 2009. The adoption of this standard did not have a material impact on our Consolidated Financial Statements. References to authoritative accounting literature contained in our financial statements are made in accordance with the ASC.