I don't think there is a time limit as such, but a notification period.
Details on this doco (in section 27 of course!)
http://www.legislation.vic.gov.au/Domino/Web_Notes/LDMS/PubLawToday.nsf/95c43dd4eac71a68ca256dde00056e7b/9455C2EC06C1DB25CA2573B7000629D9/$FILE/62-6975a126.pdf
Cheers,
The Y-man