Section 77 (1) does not apply if the disclosure of the confidential information by a relevant person is authorised by the chief executive for the purposes of—
(a) monitoring the incidence and patterns of notifiable conditions; or
(b) identifying the source of outbreaks of notifiable conditions; or
(c) identifying persons who may transmit a notifiable condition to others, to prevent or minimise the transmission of the condition; or
(d) identifying persons who may have contracted, or may be at risk of contracting, a notifiable condition, to prevent or minimise the transmission of the condition; or
(e) contact tracing by a contact tracing officer.