Permanent Residence Date的解释:如果你在境外获得pr,就是首次持pr签证入境的日子。
Lawful Residence date的解释:如果你在境外获得pr或tr,就是首次持此签证入境的日子。如果你在境内时候获得pr或tr,下签时候为Lawful Residence date。
(If you were granted a Temporary Residence or Permanent Residence visa before you arrived in Australia, the date that you first arrived on that visa is the Lawful Residence date. If you were granted a Temporary Residence or Permanent Residence visa after you arrived in Australia, the date that that visa was granted is the Lawful Residence date.)