---
kind: "section"
citation: "49 C.F.R. § 1580.101"
title: "49"
number: "1580.101"
heading: "Applicability."
url: "https://uscodex.org/cfr/49/1580.101"
---

# §1580.101. Applicability.


This subpart applies to each of the following owner/operators:

- (a) Described in [§ 1580.1(a)(1)](/cfr/49/1580.1.md?p=a-1) of this part that is a Class I freight railroad.
- (b) Described in [§ 1580.1(a)(1)](/cfr/49/1580.1.md?p=a-1) of this part that transports one or more of the categories and quantities of RSSM in an HTUA.
- (c) Described in [§ 1580.1(a)(4)](/cfr/49/1580.1.md?p=a-4) of this part that serves as a host railroad to a freight railroad described in [paragraph (a)](#a) of (b) of this section or a passenger operation described in [§ 1582.101](/cfr/49/1582.101.md) of this subchapter.

## Notes

### Authority

Authority: 49 U.S.C. 114; Pub. L. 110-53 (121 Stat. 266, Aug. 3, 2007) secs. 1501 (6 U.S.C. 1151), 1512 (6 U.S.C. 1162) and 1517 (6 U.S.C. 1167).

### Source

Source: 85 FR 16506, Mar. 23, 2020, unless otherwise noted.