The objects of this Part are:
(a) to provide a national system of public health surveillance to enhance the capacity of the Commonwealth and the States and Territories to identify, and respond to, public health events of national significance which include:
(i) the occurrence of certain communicable diseases; or
(ii) certain releases of chemical, biological or radiological agents; or
(iii) the occurrence of public health risks; or
(iv) the occurrence of overseas mass casualties; and
(b) to provide for the sharing of information with:
(i) the World Health Organization; and
(ii) countries affected by an event relating to public health or an overseas mass casualty; and
(c) to support the Commonwealth and the States and Territories in giving effect to the International Health Regulations (other than as mentioned in paragraphs (a) and (b)).