That would make more sense - I know from renting commercial space (with cell towers on the roof) that the power and service can be independent of the building (i.e. power comes from the street). Maybe that's not true in BART. I'd agree that their "macro-switch" is probably legal (contractual), rather than a physical switch. I'm interested in hearing a file opinion on this, considering that BART is self powered rather than connected to grid(s) the cities it serves?