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435 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.530 

must be orange. The ‘‘*’’ shall be re-
placed, when required, with the appro-
priate compatibility group letter. The 
division numeral, 1.6, must measure at 
least 64 mm (2.5 inches) in height. The 
text, numerals and inner border must 
be black. 

[Amdt. 172–123, 55 FR 52603, Dec. 21, 1990, as 
amended at 56 FR 66261, Dec. 20, 1991; Amdt. 
172–130, 58 FR 51531, Oct. 1, 1993] 

§ 172.526

[Reserved] 

§ 172.527

Background requirements for 

certain placards. 

(a) Except for size and color, the 

square background required by 
§ 172.510(a) for certain placards on rail 
cars, and § 172.507 for placards on motor 
vehicles containing a package of high-
way route controlled quantity radio-
active materials, must be as follows: 

(b) In addition to meeting the re-

quirements of § 172.519 for minimum du-
rability and strength, the square back-
ground must consist of a white square 
measuring 14

1

4

inches (362.0 mm.) on 

each side surrounded by a black border 
extending to 15

1

4

inches (387.0 mm.) on 

each side. 

[Amdt. 172–29, 41 FR 15996, Apr. 15, 1976, as 
amended by Amdt. 172–64, 46 FR 5316, Jan. 19, 
1981; Amdt. 172–78, 48 FR 10226, Mar. 10, 1983] 

§ 172.528

NON-FLAMMABLE GAS 

placard. 

(a) Except for size and color, the 

NON-FLAMMABLE GAS placard must 
be as follows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
NON-FLAMMABLE GAS placard must 
be green. The letters in both words 
must be at least 38 mm (1.5 inches) 
high. The symbol, text, class number 
and inner border must be white. 

[Amdt. 172–123, 56 FR 66261, Dec. 20, 1991] 

§ 172.530

OXYGEN placard. 

(a) Except for size and color, the OX-

YGEN placard must be as follows: 

(b) In addition to complying with 

§ 172.519 of this subpart, the background 
color on the OXYGEN placard must be 
yellow. The symbol, text, class number 
and inner border must be black. 

[Amdt. 172–123, 56 FR 66262, Dec. 20, 1991] 

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