Well there are two ways this can go.
If a service change is deemed as requiring simply changing everything between the PoCo connection and the branch circuit connections, then none of the 'downstream' requirements come into the picture.
If a service change is deemed to be 'modifying' everything downstream, then it's a complete rewire - and the scale of the work will in turn require additional circuits, TR receptacles, AFCI's, hard-wired smokes,that ground wire, etc.
Keep in mind that you're already required to 'up' the service to 100 amp- even if the place is a tiny hut that gets along quite happily on a 30-amp fusebox.
So why the service change? Well, because the property changed hands, and the insurance company wants 100 amps, wants breakers in place of fuses, and probably frowns on K&T as well.
With the remodel a complete gut, it's but a short step to require modern earthquate, fire, and energy rules. It is as if someone waved a magic wand and can require you to knock down and rebuild your home simply because of its' age - all because a simple sale took place.
My comments on such a construction of code requirements range from quoting the Tories to the profane.
IMO, you're not 'altering' the circuit any more than were you to replace an ivory receptacle with a white one.
Last edited by renosteinke; 04/02/11 08:12 PM.
