As an FYI, I believe we have to set our point of attachment at 15ft. If we can't get it directly on the structure we have to put up a Mast. Sometimes POCO here will allow less if the Pole is close.
Many times situations arise where we can't just put it back the way it was. Sometimes you can catch a break with some things, but I wouldn't count on it. Generally we know if we're doing a service replacement or an upgrade that everything must be brought up to current specs.