Sam Wilson, 05/11/2017 11:24:
Are civil registry districts considered "administrative districts"?
If you're just asking about Australia I don't know, but if you mean in general then I don't think there's a general answer. There is a lot of variance in terms of content, responsible entities and geographical distribution.
For instance in Italy the "registro dello stato civile" is handled by municipalities but then there are things handled by a "notaio", who can be anywhere but eventually deposits records in the state archives organised by province. And then some things are handled directly by some ministry or agency thereof, and some others are elsewhere (e.g. churches).
So maybe you'd need to define what kind of information you're looking for, e.g. X <registry for> birth/death information (qualifiers: after 19xx, within area Y, by law/custom/whatever).
Federico