Hi
This
Government document states that to set up a business in such a job (electrician, mechanic, hairdresser, baker, butcher... this is the case for 53 specific jobs but not all jobs), you must have a so-called "Meisterbrief".
This remains intact.
No "Meisterbrief", no self-employment.
What you are able to do is to apply for a Meisterbrief without having to study for it if you have
six continuous years of experience in that specific job within the EU as an EU or EEA citizen. The length, the lack of breaks and the content of the experience will be checked closely by the relevant Guild (Handelskammer). You can get around this restriction on opening a business by employing someone with a Meisterbrief should you not have the 6 years continuous.
Ah I've just spotted that you are from NZ, the above info is for EU citizens.
German Embassy in Wellington gives a link to
the German Foreign Office. Your best bet is to contact them regarding this issue.
Katrina