There's another avenue used here in the Twin Cities in addition to requiring minimum standards be met for branch circuit wiring of single family dwellings before the AHJ will allow the PoCo to make its permenant connection to the new larger service.
Every house that gets listed for sale has to have a "Truth In Sale Of Housing" inspection report available that details all the compliant, not compliant, missing and hazardous items about the whole dwelling. This is detailed on a room by room basis, including unfinished areas, exterior and out buildings and runs to six or eight pages. This, of course, catches a lot more than just the electrical system.
Many times the Seller will use an inspection report to guide their "puffing" of the dwelling as they prepare to sell, and will then reinspect immediately before putting the house on the market. Items that are left undone are negotiated as part of the sale. Seller, Buyer, realtors, lenders, mortgage underwriters and insurance agents all get the chance to participate at that point.
Al
