澳洲签证Visa condition(s)都有这些内容吗？

以前申请只记得有：8101和8201.下面这些以前没有啊。什么意思？？
Above does not apply for holders of:

Student Guardian (subclass 580) visa holders, who is undertaking an English Language Intensive Courses for Overseas Students (ELICOS) of less than 20 hours per week
Medical Treatment (subclasses 602, 675, 685) visa holders where they:
Are under 18; and
Has experienced a change in circumstances while in Australia; and
Has obtained permission in writing to engage for more than three months in any studies or training because of compelling and compassionate circumstances.​