[Code of Federal Regulations] [Title 19, Volume 1] [Revised as of April 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 19CFR10.43] [Page 120] TITLE 19--CUSTOMS DUTIES CHAPTER I--BUREAU OF CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY PART 10_ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC.--Table of Contents Subpart A_General Provisions Sec. 10.43 Duty-free status. (a) The port director may, at his discretion, require appropriate proof of duty-free status for articles for institutions claimed to be exempt from duty under subheadings 9810.00.05, 9810.00.15, 9810.00.25, 9810.00.30, 9810.00.40, 9810.00.45, 9810.00.50, 9810.00.55, Harmonized Tariff Schedule of the United States (19 U.S.C. 1202). (b) Appropriate proof may be a copy of the charter or other evidence of the character of the institution for the use of which the articles are imported. [T.D. 85-123, 50 FR 29953, July 23, 1985, as amended by T.D. 89-1, 53 FR 51249, Dec. 21, 1988]