Hi,
Cathy, I don't know, but you may wish to start by reading the FHOG Act...
http://www.austlii.edu.au/cgi-bin/disp.pl/au/legis/act/consol%5fact/fhoga2000250/?query=title+%28+%22first+home+owner+grant%22+%29
Then if you find something that interests you, print it out and go see your...