[Code of Federal Regulations] [Title 14, Volume 1] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR45.21] [Page 906] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 45_IDENTIFICATION AND REGISTRATION MARKING--Table of Contents Subpart C_Nationality and Registration Marks Sec. 45.21 General. (a) Except as provided in Sec. 45.22, no person may operate a U.S.- registered aircraft unless that aircraft displays nationality and registration marks in accordance with the requirements of this section and Sec. Sec. 45.23 through 45.33. (b) Unless otherwise authorized by the Administrator, no person may place on any aircraft a design, mark, or symbol that modifies or confuses the nationality and registration marks. (c) Aircraft nationality and registration marks must-- (1) Except as provided in paragraph (d) of this section, be painted on the aircraft or affixed by any other means insuring a similar degree of permanence; (2) Have no ornamentation; (3) Contrast in color with the background; and (4) Be legible. (d) The aircraft nationality and registration marks may be affixed to an aircraft with readily removable material if-- (1) It is intended for immediate delivery to a foreign purchaser; (2) It is bearing a temporary registration number; or (3) It is marked temporarily to meet the requirements of Sec. 45.22(c)(1) or Sec. 45.29(h) of this part, or both. [Doc. No. 8093, Amdt. 45-5, 33 FR 450, Jan 12, 1968, as amended by Amdt. 45-17, 52 FR 34102, Sept. 9, 1987]