(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 §45.22(c)(1) or §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]