Which of the following versions of the National Electrial Code (NEC) is valid in a given area?

Which of the following versions of the National Electrial Code (NEC) is valid in a given area?

A.
The one most recently published, except any portions overwritten or extended by state
governments?

B.
The one most recently published, except any portioins overwritten or extended by the federal
government.

C.
The one most recently accepted by local government, except any portions overwritten or
extended by local government.

D.
The one most recently accepted by the federal government, except any portions overwritten
or extended by the federal government.