It appears 2005 NEC is the oldest code cycle in effect for local jurisdictions in Missouri, and some Mississippi locals, without State adoption.
There is some Local-code adoptions that lag behind neighbor-State adoptions, but no one escapes the Insurance Adjuster (AHJ).
The insurance industry was defined as an Authority Having Jurisdiction (AHJ), in the FPN:, before 2005 NEC cycle, so they still rule everywhere.
"For insurance purposes", forensic adjusters are code inspectors, enforcers, and can define what is "approved", per 90.7 & 110.2. While courts rule on the industry's behalf, Insurance plaintiffs shape the law that denies claims with any code, license, or workers comp. illegality.
With local adoption for NEC compliance, the Mississippi supreme court demonstrated its advocacy for building code law by punishing Cities that issue permits during qualification violations or code negligence
, Lowe v. Lowndes County Building Inspection Department, 760 So. 2d 711 (Miss. 2000).
This case is a model thru-out the country, for the judicial process that describes fire & building code negligence, and what happens to property-owner fools who hire unqualified contractors, and the building departments who permit them.