SEPTA commuter crews usually go out with an Employee Timetable (ETT), which includes the operating characteristics of the lines owned by the railroad, green bulletin sheets with updates and temporary issues, and Amtrak bulletins for those territories over which they operate. In Conrail days, they weren't required to carry Conrail ETTs even though they often shared trackage with Conrail, and vice versa. That's still quite likely the case with CSX. They would also carry a NORAC rulebook since most of the railroads in this region are NORAC members, and, often, a NORAC signal card. Additionally, they would carry Form D papers for unusual and dark-territory operations.
Conrail crews, similarly, carried ETTs for the operating region over which they operated, Form Ds, and, perhaps Zone-Track-Spot maps to handle set-outs, and a book on hazmat materials. I do not know which of these was mandated by company policy or law, apart from ETTs.
Quite a lot of this stuff is available at multimodalways.org.
