[Code of Federal Regulations] [Title 31, Volume 2] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 31CFR363.35] [Page 487] TITLE 31--MONEY AND FINANCE: TREASURY CHAPTER II--FISCAL SERVICE, DEPARTMENT OF THE TREASURY PART 363_REGULATIONS GOVERNING SECURITIES HELD IN TREASURYDIRECT--Table of Contents Subpart B_General Provisions Governing Securities Held in TreasuryDirect Sec. 363.35 When is a transaction effective? A transaction is effective when we post it to our records.