This volume contains all of the relevant Internal Revenue Code provisions and Treasury regulations necessary for introductory classes in United States international taxation. The volume is updated to include recent changes in the Treasury regulations and statutory changes made by the Tax Increase Prevention and Reconciliation Act, the Pension Protection Act of 2006, and the Tax Relief and Health Care Act of 2006. It is specially geared for use in two- or three-unit international taxation courses, and includes essential legislation and regulations affecting U.S. taxation of foreign entities and domestic entities whose income derives from outside the United States.