[Code of Federal Regulations] [Title 33, Volume 2] [Revised as of July 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR173.31] [Page 879] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY(CONTINUED) PART 173_VESSEL NUMBERING AND CASUALTY ANDACCIDENT REPORTING--Table of Contents Subpart B_Numbering Sec. 173.31 Surrender of certificate of number. A person whose name appears as the owner of a vessel on acertificate of number shall surrender the certificate in a mannerprescribed by the issuing authority within 15 days after it becomesinvalid under paragraph (b), (c), (d), or (e) ofSec. 173.77.