Clarification time...
New construction (or addition) ufer is installed before concrete pour by Building Inspector. He checks rebar, lengths, ties, clamp (approved) and # 4 AWG Cu minimum size.
Electrical Inspector does not see ufer/rebar only #4 at point of emergence from concrete.
If and when the ufer is NOT installed, or 'lost' it is no longer 'available' and cannot be used. The concrete is not mandated to be chipped, cut, etc. Other means of providing the ground are utilized, as before the ufer was an option
(New Jersey style)