Determination of Interest Expense Deduction of Foreign Corporations (US Internal Revenue Service Regulation) (IRS) (2018 Edition) The Law Library presents the complete text of the Determination of Interest Expense Deduction of Foreign Corporations (US Internal Revenue Service Regulation) (IRS) (2018 Edition). Updated as of May 29, 2018 This document contains revised Income Tax Regulations relating to the determination of the interest expense deduction of foreign corporations and applies to foreign corporations engaged in a trade or business within the United States. This action is necessary to conform the rules to subsequent U.S. Income Tax Treaty agreements and to adopt changes to facilitate improved administrability for taxpayers and the IRS. This book contains: - The complete text of the Determination of Interest Expense Deduction of Foreign Corporations (US Internal Revenue Service Regulation) (IRS) (2018 Edition) - A table of contents with the page number of each section