This excerpt taken from the GMKT 20-F filed Jun 13, 2008.
Critical Accounting Policies and Estimates
Our discussion and analysis of our financial condition and results of operations are based upon our financial statements and the notes thereto, which have been prepared in accordance with U.S. GAAP. The preparation of these financial statements requires us to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, contingent liabilities, and revenues and expenses during the reporting periods. We evaluate our estimates on an ongoing basis based on historical experience and other assumptions we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. The policies discussed below are considered by our management to be critical because they are not only important to the portrayal of our financial condition and results of operations but also the application and interpretation of these policies require both judgment and estimates of matters that are inherently uncertain and unknown. As a result, actual results may differ materially from our estimates.