IAEI reviews the Code so its members are well versed in the changes but they have nothing to do with revising or changing the NEC
... well almost.
IAEI usually has people on the TCC and a number of IAEI officials on the various CMPs. They also submit a lot of proposals under the IAEI banner.
The same is true of the IBEW, big manufacturers and NEMA.
This is far from a pure "user based" process as they would have us believe. Big money swings a big club at NFPA.
