<blockquote rel="paupau29">@bookworm @xiaomau82 kelan din po ba kumukuha ng police clearance? Pag business trip hindi naman kailangan no? Pag di naman lumampas ng 12 months cummulative?</blockquote> Yes no need.
If you are applying for temporary or permanent migration
For the Australian Government to determine whether you are of good character, you might be asked to provide police certificates for each country you have lived in for 12 months or more, over the last 10 years, since turning 16 years of age.
You must declare all recorded offences to us. If you do not declare an offence and we become aware of this it might have a negative impact on your application.
Do not finalise any travel arrangements until after the grant of your visa. This is because visa processing times can vary depending on the visa type and your personal circumstances.
When is a police certificate required?
If you are over the age of 16 and have lived in any of the countries listed on this page for a total of one year or more in the last 10 years, you must get a police certificate from that country.
The certificate must cover the period of time from the issue date back to the age you ceased to be a minor, or must cover the whole time you were in a country.
For immigration purposes a police certificate is deemed to be valid for 12 months from the issue date.
http://www.immi.gov.au/Help/Pages/character-police/requirements.aspx