Section § 397.1: Application of the rules in this part.Below are the available interpretations for the given section. To return to the list of parts, use the Parts link above. The menu to the left provides a full list of sections that have interpretations. To view interpretations for a different section, click on the menu item.
The regulations text of the section can be found on the eCFR website. To view the regulations text, use the link below. For assistance, please send an email to FMCSA.Webmaster@dot.gov.
View regulations for Part 397
Question 1: Who is subject to part 397?
Guidance: Part 397 applies to motor carriers that transport HM in interstate commerce in types and quantities requiring marking or placarding under 49 CFR 177.823. The routing requirements of part 397 establish guidelines State and Indian tribal routing agencies must employ in designating and/or restricting routes for the transportation of HM. Interstate motor carriers transporting HM, in interstate or intrastate commerce, must comply with the designations and restrictions established by the routing agencies.
Question 2: Is the interstate transportation of anhydrous ammonia, in nurse tanks, subject to part 397?
Guidance: Guidance: The requirements of part 397 do not apply to the direct application of ammonia to fields from nurse tanks. However, part 397 does apply to the transportation of nurse tanks on public highways, when performed by interstate motor carriers.