Here in NJ, we are still using the '99 NEC
Our State lawmakers (DCA) are the adopting agency, as they include various "codes" within the State Uniform Construction Code.
We (Lic Electrical Contractors & Inspectors) have to take mandatory continuing ed classes and seminars; the 2002 is used for the classes and seminars. We "work" with the '99.
To make it more interesting, "old" permits are subject to the NEC that was in effect at the time the permit was issued. Sometimes, you have to dig out the "96, '93' 90 editions.