[Code of Federal Regulations] [Title 14, Volume 2] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR103.21] [Page 688] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 103_ULTRALIGHT VEHICLES--Table of Contents Subpart B_Operating Rules Sec. 103.21 Visual reference with the surface. No person may operate an ultralight vehicle except by visual reference with the surface.