Kurt - I think you've hit the nail on the head. The co-op board has asked for it, but they don't know what they are asking for. Unfortunately, without any guidance, the electrician I called said that means he has to take off every wall plate and fixture to properly inspect. I was hoping I could get away with something a little less disruptive and time consuming (i.e. expensive). That said, what John said about checking wiring on a somewhat regular basis is probably warranted. Especially since the building is 1920s era, not 1960s (your crystal ball was off).