Pipeline and Haz. Matls. Safety Admin., DOT

(2) The square-on-point must be durable, legible and of a size relative to the
package as to be readily visible. The
square-on-point must be applied on at
least one side or one end of the outer
packaging. The width of the border
forming the square-on-point must be at
least 2 mm and the minimum dimension of each side, as measured from the
outside of the lines forming the border,
must be 100 mm unless the package size
requires a reduced size marking that
must be no less than 50 mm on each
side and the width of the border forming the square on point may be reduced
to a minimum of 1 mm. Where dimensions are not specified, all features
shall be in approximate proportion to
those shown.
(i) 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.
(ii) For domestic transportation, a
packaging marked prior to January 1,
2017 and in conformance with the requirements of this paragraph in effect
on December 31, 2014, may continue in
service until the end of its useful life.
(c) Limited quantity markings prescribed in paragraphs (a) and (b) of this
section may use the packaging itself as
the contrasting background for the

Section 172.315

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 recognizable.
(d) Transitional exceptions - (1) Alternative markings. Except for transportation by aircraft and until December
31, 2015, a package containing a limited
quantity may continue to be marked in
accordance with the requirements of
this section in effect on October 1, 2010
(i.e., square-on-point with identification number only) as an alternative to
the marking required by paragraph (a)
of this section.
(2) ORM-D marked packaging. Except
for transportation by aircraft and until
December 31, 2020, a packaging marked
in accordance with Section 172.316 of this part
is not required to be marked with the
limited quantity marking required by
paragraph (a) of this section. For
transportation by aircraft and until
December 31, 2012, a packaging marked
in accordance with Section 172.316(a)(1) is not
required to be marked with the limited
quantity  - Y -  marking required by
paragraph (b) of this section.
[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]

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