One shipping paper covers both a hazardous material and freight that is not regulated. What three ways does the regulation allow for setting the hazardous entries apart?

Explanation

Three methods are offered and any one of them satisfies the rule: the hazardous entries come first, or they appear in a color that clearly contrasts with the description of the unregulated material, or an X goes before the basic description in a column captioned HM, with RQ allowed in place of the X where that is appropriate. The color option carries its own limits worth knowing, since it reaches only the four parts of the basic description and, on a reproduction of a shipping paper, the description may be highlighted in a contrasting color instead of printed in one. Reading the rule as a single mandatory method is the trap the last option sets, and it matters in practice because a driver checking a paper has to recognize all three forms rather than only the one a familiar shipper happens to use. The other two wrong options invent conventions the regulation never adopts, putting the hazardous entries last or signaling them with underlining, red ink, attached labels or stamps.

Source: 49 CFR 172.201(a)(1)