[Code of Federal Regulations] [Title 33, Volume 1] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR64.21] [Page 154] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PART 64_MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS --Table of Contents Subpart C_Structures Sec. 64.21 Marking and notification requirements. Source: CGD 78-156, 48 FR 11267, Mar. 17, 1983, unless otherwise noted. Redesignated by CGD 91-031, 57 FR 43402, Sept. 21, 1992. Before establishing a structure, the owner or operator shall apply for Coast Guard authorization to mark the structure in accordance with Sec. 66.01-5 of this chapter. The appropriate District Commander will determine the marking requirements.