The requirements of this subpart apply to the following:

(a) Amtrak (also known as the National Railroad Passenger Corporation).

(b) Each owner/operator identified in Appendix A to this part.

(c) Each owner/operator described in §1582.1(a)(1) through (3) of this part that serves as a host railroad to a freight operation described in §1580.301 of this subchapter or to a passenger train operation described in paragraph (a)(1) or (a)(2) of this section.