Limits the applicability of Treasury Notice 2008-83 (suspending restrictions on the offset of net operating losses and unrealized built-in losses against the taxable income of certain corporate entities that acquire or merge with other entities) to a period beginning on September 30, 2008, and ending on the earlier of the date of the first committee action on this Act or the date on which the Chairman of the House Committee on Ways and Means and the Chairman of the Senate Committee on Finance issue a joint statement indicating their intent to to terminate the application of such notice. Directs the Inspector General of the Department of the Treasury to conduct an investigation into the issuance of Treasury Notice 2008-83 and report to Congress on such investigation.