How did Pan Am avoid PTC?

Between CP LJ and CP HA is about 14 mis., and Pan Am hosts Haverhill MBTA trains and Amtrak Downeasters in addition to running its own trains. The Freight Main Line between Ayer and Fitchburg is pretty busy also. How did Pan Am manage to exempt these heavily trafficked lines from PTC requirements?
Andy
Jacksonville, FL

The two routes you mention are owned by MBTA and getting PTC. The Wachusett extension deal was written after PTC was on the horizon and stipulated MBTA pay for it. PAR gets a regional railroad exemption on the rest of the system. Haverhill to Portland is more like 10MGTs. This is the so-called "Susan Collins Amendment" which was written specifically to exempt Maine from having to pay for PTC on the NNEPRA route. I think if NNEPRA adds one more round trip it will override the exemption and trigger PTC. NECR got the benefit of this as well on the Vermonter route.

PAS has to have I-EMTS PTC to get to Rotterdam Jct. as well, so a train can't traverse Rotterdam-Portland without changing the lead unit going forward.

The passenger exemption covers no more than 12 trains, so they can add 1 more round-trip before needing PTC under regulation after MBTA territory ends.

As noted, Pan Am is exempt under the regulation due to their status as a regional railroad, their tonnage and limited passenger service. However they do need to have vehicles equipped to run on other railroads as previous posters noted.

3403 and 3404 were recently equipped, not sure of how many of the GE's have it.

The 3400's have been equipped with i-ETMS sitting on the control stand.