Yes, they are from the NEC ... BUT ...
This is from the IRC ...
- E3301.2 Scope.
Chapters 33 through 42 shall cover the installation of electrical systems, equipment and components indoors and outdoors that are within the scope of this code, including services, power distribution systems, fixtures, appliances, devices and appurtenances. Services within the scope of this code shall be limited to 120/240-volt, 0- to 400-ampere, single-phase systems. These chapters specifically cover the equipment, fixtures, appliances, wiring methods and materials that are most commonly used in the construction or alteration of one- and two-family dwellings and accessory structures regulated by this code. The omission from these chapters of any material or method of construction provided for in the referenced standard NFPA 70 shall not be construed as prohibiting the use of such material or method of construction. Electrical systems, equipment or components not specifically covered in these chapters shall comply with the applicable provisions of the NFPA 70.
Your situation is one where you tell your client 'The NEC is recognized nationally by all the major insurance companies as *the minimum standard for electrical systems* and it is becoming apparent that your builder as no concern for you life safety as he insists on not taking care of even the smallest and easiest to correct items.'
Then add '*I* can only point out what is not up to *minimum* requirements, I doubt that the builder advertised this house as *minimum housing* ... did you buy this as *minimum housing*? If not, I would contact the local building department as find out what they say about this items.' (then list the items)
That's about all you can do, and that's what I've done on many homes.