[Code of Federal Regulations] [Title 31, Volume 2] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 31CFR308.3] [Page 159] TITLE 31--MONEY AND FINANCE: TREASURY CHAPTER II--FISCAL SERVICE, DEPARTMENT OF THE TREASURY PART 308--GENERAL REGULATIONS GOVERNING FULL-PAID INTERIM CERTIFICATES--Table of Contents Sec. 308.3 Exchanges of denominations. Pending availability of definitive securities, exchanges of authorized denominations of interim certificates, from higher to lower will be permitted.