Old Appy,
The EST Registration,here in NZ, is not as limiting as all that, provided that the holder has at least EST B Class.
I know of, and work with a lot of Refrigeration Engineers, Radio Technicians,
Industrial controls Tech's,etc, and to a certain extent, this is all they feel they need, for their line of work, after all an Electrician is only a cellphone call away these days!.