(a) to investigate, and furnish reports to the Secretary on,
matters affecting public health in that part of the State, if directed to do
so by the Secretary,
(b) to co-ordinate activities and local government
authorities in that part of the State in relation to the reduction of any
risks to public health in that part of the State,
(c) to co-ordinate the
activities of authorised officers in relation to the enforcement of this Act
and the regulations within that part of the State,
(3) The public health officer
for a part of the State may not exercise any function except in relation to
matters concerning, or arising within, that part of the State.