Multiple entries to and from Australia during the validity of your visa
Must not arrive after
21/02/2015
Period of stay
03 years stay on each arrival
在grant mail里的pdf有句话: How long is the visa valid for?
As the visa has been granted offshore, the visa does not come into effect until the date of first entry, into Australia by the Primary Applicant. This means that the Skilled – Regional Sponsored (subclass 475) visa comes into effect and is valid for three (3) years from the date the Primary Applicant arrives in Australia.