49 CFR §215.3

1. (a)Except as provided in paragraphs (b) and (c) of this section, this part applies to each railroad freight car in service on:
   1. (1)Standard gage track of a railroad; or
   2. (2)Any other standard gage track while the car is being operated by, or is otherwise under the control of, a railroad.
2. (b)Sections 215.15 and 215.303 of this part do not apply to any car:
   1. (1)Owned by a Canadian or Mexican Railroad; and
   2. (2)Having a Canadian or Mexican reporting mark and car number.
3. (c)This part does not apply to a railroad freight car that is:
   1. (1)Operated solely on track inside an industrial or other non-railroad installation; or
   2. (2)Used exclusively in dedicated service as defined in § 215.5(d) of this part; or
   3. (3)Maintenance-of-way equipment (including self-propelled maintenance-of-way equipment) if that equipment is not used in revenue service and is stenciled in accordance with § 215.305 of this part.
   4. (4)Operated in a passenger train and that is inspected, tested, maintained, and operated pursuant to the requirements contained in part 238 of this chapter.