For the purposes of this Part, each of the following is a permissible purpose :
(a) preventing, protecting against, controlling or responding to a public health event of national significance (other than an overseas mass casualty);
(b) giving effect to the International Health Regulations (other than as mentioned in paragraph (a));
(c) if an Australian suffers from a disease, or is injured or dies, as a result of an overseas mass casualty--facilitating:
(i) the identification of the Australian (whether in Australia or overseas); and
(ii) the repatriation of the Australian to Australia; and
(iii) the treatment of the Australian (whether in Australia or overseas);
(d) if a person who is not an Australian suffers from a disease, or is injured or dies, as a result of an overseas mass casualty--facilitating:
(i) the identification of the person (whether within Australia or overseas); and
(ii) bringing the person to Australia for treatment; and
(iii) the treatment in Australia of the person;
(e) preventing, or reducing the possibility of, a listed human disease entering, or emerging, establishing itself or spreading in, Australian territory or a part of Australian territory;
(f) preventing a listed human disease from spreading to another country.