https://www.greatamericanstations.com/stations/harpers-ferry-wv-hfy/
- Facility Ownership: National Park Service
- Parking Lot Ownership: National Park Service
- Platform Ownership: CSX Transportation
- Track Ownership: CSX Transportation
SO! The way the law works, the owners (NPS and CSX) are required to cooperate with projects to make the station accessible.
"(C) Required cooperation
It shall be considered discrimination for purposes of section 12132 of this title and section 794 of title 29 for an owner, or person in control, of a station governed by subparagraph (a) or (b) to fail to provide reasonable cooperation to a responsible person with respect to such station in that responsible person's efforts to comply with such subparagraph. An owner, or person in control, of a station shall be liable to a responsible person for any failure to provide reasonable cooperation as required by this subparagraph. Failure to receive reasonable cooperation required by this subparagraph shall not be a defense to a claim of discrimination under this chapter."
However, they don't have to pay for it. Financial responsibility for accessibility is not entirely clear. Either it is the NPS (clause 5A), or it is Amtrak and MARC (5B), or it is the NPS, Amtrak, and MARC (clause 5C):
"(5) Responsible person
The term "responsible person" means
(A) in the case of a station more than 50 percent of which is owned by a public entity, such public entity;
(B) in the case of a station more than 50 percent of which is owned by a private party, the persons providing intercity or commuter rail transportation to such station, as allocated on an equitable basis by regulation by the Secretary of Transportation; and
(C) in a case where no party owns more than 50 percent of a station, the persons providing intercity or commuter rail transportation to such station and the owners of the station, other than private party owners, as allocated on an equitable basis by regulation by the Secretary of Transportation."
The DOT regulation (
Preamble--Transportation for Individuals with Disabilities [September 6, 1991] | FTA -- see section 37.49 for discussion) allocates responsibility among Amtrak and MARC according to passenger boardings. If clause 5C applies, the NPS gets half the responsibility.
I suspect that if a disabled passenger sued Amtrak, MARC, the NPS, and CSX jointly, the judge would sort out pretty quickly the percentages of station ownership or force an agreement -- the problem with the law is that it's not clear on what basis the percentage is calculated (assessed value? square footage?). At the moment all four of them would probably lose a lawsuit by a disabled passenger, so it would be in their interest to make a deal and make something happen.
MARC can end service entirely if it wants to; Amtrak can't. It's only required to be accessible because it's an Amtrak station, since it isn't a "key station" for MARC. So I would expect Amtrak and the NPS to pay for it, possibly with a contribution from West Virginia if it wants to keep MARC service. Since the NPS renovated the building (the part they own) in 2007 -- hopefully in compliance with ADA standards -- they probably feel that they've paid for their part already.
"(e) Persons who must share responsibility for
station accessibility under paragraphs (c) and (d) of this section may, by agreement, allocate their responsibility in a manner different from that provided in this section. " (49 CFR 37.49)
Amtrak really needs to build and pay for the remainder on its own; it is the entity with the maximum legal exposure and the one which will be paying out first if passengers sue over inaccessibility. NPS and CSX are not legally permitted to cause obstructions to the process and Amtrak should sue them if they are causing obstructions.