[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: 14CFR103.11] [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. 103.11 Daylight operations. (a) No person may operate an ultralight vehicle except between the hours of sunrise and sunset. (b) Notwithstanding paragraph (a) of this section, ultralight vehicles may be operated during the twilight periods 30 minutes before official sunrise and 30 minutes after official sunset or, in Alaska, during the period of civil twilight as defined in the Air Almanac, if: (1) The vehicle is equipped with an operating anticollision light visible for at least 3 statute miles; and (2) All operations are conducted in uncontrolled airspace.