From memory, prior to edu.au moving to a new registrar, issuing edu.au 
domains in the 4th level was actual edu.au policy.

Unless you were a major university or similar, you couldn't register any 
other way. Your local school was forced to register xxx.vic.edu.au etc

Cheers,

-j


>NSW Government Department of Education issues their primary and secondary
>schools domain names at the fifth level under schools.nsw.edu.au - e.g.:
>
>   http://www.rainbowst-p.schools.nsw.edu.au/
>   http://www.randwickb-h.schools.nsw.edu.au/
>
>So one payment of $50 per year for schools.nsw.edu.au covers all the domain
>names for approximately 2,200 schools - which is pretty cost effective from
>the Department of Education's perspective.
>
>The downside of this trade-off is a fifth level domain name that's not
>exactly "easy to remember".