I guess it depends on the local authority how they handle that stuff. We got minimal training (just flying one LNAV/VNAV or IAN approach during normal SIM checks) and are approved to fly them down to MDA serving as a DA for non precision approaches. Only restriction is that we have to use the autopilot on approaches with an RNP of 0.15 or lower until visual reference is aquired during the approach.
Of course IAN makes it even easier as you fly the NPA absolutely the same way as you do ILSs with the exception that you can only use one autopilot.