I just got back from a trip to Montana using the H459 code.

The only way to make this work is to not call Amtrak. Do not stop at a ticket booth with a person attending because they will verify that you actually do qualify. So you need to be sure that you have the correct names of the people you are purchasing the ticket for.

You need to book online and have the tickets mailed to you. The tickets will need the signature of the person whose name appears on the ticket and a photo ID will be required after boarding the train.

Aside from that I had no problems and had to change trains each direction, so I had four sets of tickets.

If you call Amtrak they will probably determine that you don't qualify and cancel your tickets.