[Code of Federal Regulations] [Title 26, Volume 18, Parts 500 to 599] [Revised as of April 1, 2000] From the U.S. Government Printing Office via GPO Access [CITE: 26CFR521.107] [Page 149] TITLE 26--INTERNAL REVENUE CHAPTER 1--INTERNAL REVENUE SERVICE DEPARTMENT OF THE TREASURY (Continued) PART 521--DENMARK--Table of Contents Subpart--General Income Tax Sec. 521.107 Income from operation of ships or aircraft. The income derived from the operation of ships or aircraft registered in Denmark by a nonresident alien who is a resident of Denmark, or by a Danish corporation, and carrying on an enterprise in Denmark, is, for taxable years beginning on or after January 1, 1948, exempt from United States income tax under the provisions of Article V of the convention.