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867 

Federal Aviation Administration, DOT 

§ 45.29 

§ 45.23

Display of marks; general. 

(a) Each operator of an aircraft must 

display on that aircraft marks con-
sisting of the Roman capital letter ‘‘N’’ 
(denoting United States registration) 
followed by the registration number of 
the aircraft. Each suffix letter used in 
the marks displayed must also be a 
Roman capital letter. 

(b) When marks include only the 

Roman capital letter ‘‘N’’ and the reg-
istration number is displayed on lim-
ited, restricted or light-sport category 
aircraft or experimental or provision-
ally certificated aircraft, the operator 
must also display on that aircraft near 
each entrance to the cabin, cockpit, or 
pilot station, in letters not less than 2 
inches nor more than 6 inches high, the 
words ‘‘limited,’’ ‘‘restricted,’’ ‘‘light- 
sport,’’ ‘‘experimental,’’ or ‘‘provi-
sional,’’ as applicable. 

[Doc. No. 8093, Amdt. 45–5, 33 FR 450, Jan. 12, 
1968, as amended by Amdt. 45–9, 42 FR 41102, 
Aug. 15, 1977; Amdt. 45–24, 69 FR 44863, July 
27, 2004] 

§ 45.25

Location of marks on fixed- 

wing aircraft. 

(a) The operator of a fixed-wing air-

craft must display the required marks 
on either the vertical tail surfaces or 
the sides of the fuselage, except as pro-
vided in § 45.29(f). 

(b) The marks required by paragraph 

(a) of this section must be displayed as 
follows: 

(1) If displayed on the vertical tail 

surfaces, horizontally on both surfaces, 
horizontally on both surfaces of a sin-
gle vertical tail or on the outer sur-
faces of a multivertical tail. However, 
on aircraft on which marks at least 3 
inches high may be displayed in ac-
cordance with § 45.29(b)(1), the marks 
may be displayed vertically on the 
vertical tail surfaces. 

(2) If displayed on the fuselage sur-

faces, horizontally on both sides of the 
fuselage between the trailing edge of 
the wing and the leading edge of the 
horizontal stabilizer. However, if en-
gine pods or other appurtenances are 
located in this area and are an integral 
part of the fuselage side surfaces, the 
operator may place the marks on those 
pods or appurtenances. 

[Amdt. 45–9, 42 FR 41102, Aug. 15, 1977] 

§ 45.27

Location of marks; nonfixed- 

wing aircraft. 

(a) 

Rotorcraft.  Each operator of a 

rotorcraft must display on that rotor-
craft horizontally on both surfaces of 
the cabin, fuselage, boom, or tail the 
marks required by § 45.23. 

(b) 

Airships.  Each operator of an air-

ship must display on that airship the 
marks required by § 45.23, horizontally 
on— 

(1) The upper surface of the right hor-

izontal stabilizer and on the under sur-
face of the left horizontal stabilizer 
with the top of the marks toward the 
leading edge of each stabilizer; and 

(2) Each side of the bottom half of 

the vertical stabilizer. 

(c) 

Spherical balloons. Each operator 

of a spherical balloon must display the 
marks required by § 45.23 in two places 
diametrically opposite and near the 
maximum horizontal circumference of 
that balloon. 

(d) 

Nonspherical balloons. Each oper-

ator of a nonspherical balloon must 
display the marks required by § 45.23 on 
each side of the balloon near its max-
imum cross section and immediately 
above either the rigging band or the 
points of attachment of the basket or 
cabin suspension cables. 

(e) 

Powered parachutes and weight- 

shift-control aircraft. Each operator of a 
powered parachute or a weight-shift- 
control aircraft must display the 
marks required by §§ 45.23 and 
45.29(b)(2) of this part. The marks must 
be displayed in two diametrically oppo-
site positions on the fuselage, a struc-
tural member, or a component of the 
aircraft and must be visible from the 
side of the aircraft. 

[Doc. No. 2047, 29 FR 3223, Mar. 11, 1964, as 
amended by Amdt. 45–15, 48 FR 11392, Mar. 17, 
1983; Amdt. 45–24, 69 FR 44863, July 27, 2004; 
Amdt. 45–25, 72 FR 52469, Sept. 14, 2007] 

§ 45.29

Size of marks. 

(a) Except as provided in paragraph 

(f) of this section, each operator of an 
aircraft must display marks on the air-
craft meeting the size requirements of 
this section. 

(b) 

Height.  Except as provided in 

paragraph (h) of this part, the nation-
ality and registration marks must be 
of equal height and on— 

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