403 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.317 

section may use the packaging itself as 
the contrasting background for the 
center portion of the marking if the 
color sufficiently contrasts so that the 
black border, top and bottom portions 
of the square-on-point, and the ‘‘Y’’ 
symbol, if applicable, are clearly rec-
ognizable. 

(d) [Reserved] 

[76 FR 82174, Dec. 30, 2011, as amended at 78 
FR 1073, Jan. 7, 2013; 78 FR 65478, Oct. 31, 2013; 
80 FR 1149, Jan. 8, 2015; 81 FR 3671, Jan. 21, 
2016; 87 FR 44990, July 26, 2022; 87 FR 79772, 
Dec. 27, 2022] 

§ 172.316

[Reserved] 

§ 172.317

KEEP AWAY FROM HEAT 

handling mark. 

(a) 

General. 

For transportation by 

aircraft, each package containing self- 
reactive substances of Division 4.1 or 
organic peroxides of Division 5.2 must 
be marked with the KEEP AWAY 
FROM HEAT handling mark specified 
in this section. 

(b) 

Location and design. 

The marking 

must be a rectangle measuring at least 
105 mm (4.1 inches) in height by 74 mm 
(2.9 inches) in width as measured from 
the outside of the lines forming the 
border. Markings with not less than 
half this dimension are permissible 
where the dimensions of the package 
can only bear a smaller mark. 

(1) 

Transitional exception. 

A marking 

in conformance with the requirements 
of this paragraph in effect on December 
31, 2014, may continue to be used until 
December 31, 2016. 

(2) For domestic transportation, a 

packaging marked prior to January 1, 
2017 and in conformance with the re-
quirements of this paragraph in effect 
on December 31, 2014, may continue in 
service until the end of its useful life. 

(c) 

KEEP AWAY FROM HEAT han-

dling mark. 

The KEEP AWAY FROM 

HEAT handling mark must conform to 
the following: 

(1) Except for size, the KEEP AWAY 

FROM HEAT handling mark must ap-
pear as follows: