[Code of Federal Regulations] [Title 50, Volume 9] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 50CFR660.504] [Page 194-195] TITLE 50--WILDLIFE AND FISHERIES DEPARTMENT OF COMMERCE (CONTINUED) PART 660_FISHERIES OFF WEST COAST STATES--Table of Contents Subpart I_Coastal Pelagics Fisheries Sec. 660.504 Vessel identification. (a) Official number. Each fishing vessel subject to this subpart must display its official number on the port and starboard sides of the deckhouse or hull, and on an appropriate weather deck so as to be visible from enforcement vessels and aircraft. [[Page 195]] (b) Numerals. The official number must be affixed to each vessel subject to this subpart in block Arabic numerals at least 14 inches (35.56 cm) in height. Markings must be legible and of a color that contrasts with the background.