@Yeliboy
Taken from DIBP Website:
The following requirements apply to the period of time you have held a permanent Australian visa.
You need penal clearance certificates from overseas countries if:
you lived or travelled overseas since the age of 18 years or over, and
the total time spent overseas added up to 12 months or more, and
the time spent in any one country was more than 90 days, or
you are requested to do so by the department.
Provide a penal clearance certificate from every country that you spent more than 90 days in.