...or 500 ft above the lower limit of the CTA,...
and
from the ERSA "outside tower hrs Albury class D & E airspace 8500FT AMSL & BLW reclassified class G"
I think that you have answered your own question here, as Zhaadum has already pointed out!
Another question for you.... If you are using the NDB for azimuth guidance, and you are using it and PAST the IAFon a DME/GPS arival, can you now log this for NDB currency ?