[Code of Federal Regulations] [Title 19, Volume 1] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 19CFR4.65] [Page 50] TITLE 19--CUSTOMS DUTIES CHAPTER I--BUREAU OF CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY PART 4_VESSELS IN FOREIGN AND DOMESTIC TRADES--Table of Contents Sec. 4.65 Verification of nationality and tonnage. The nationality and tonnage of a vessel shall be verified by examination of its marine document. If such examination discloses that insufficient tonnage tax was collected on entry of the vessel, no clearance shall be granted until the deficiency is paid.