Charlie, if you check the adoption matrix (being in California, the NEC does not govern, it is only the model for the California Electrical Code), Article 80 is ONLY applicable to OSHPD governed installations (hospitals, public schools, government owned or financed buildings, etc.) not to all installations.
I have been trying to wrap my head around California's codes for a year now, performing MEP reviews, and it is not just a little confusing and confounding, it is a lot. I have learned to check the adoption matrix at the front of the code with the current codes, as of January 1, we will be on the 2007 CEC, which I have not had the opportunity to thoroughly peruse yet.
I agree that if it is a violation of a current code, it should be corrected no matter when it was installed, but legal eagles have usually had their way with this issue in the past..........of course, unless the AHJ or whomever has the authority determines that it is an imminent hazard.
Keep the faith!!