(a) may notify a
person who the Secretary or attending medical practitioner believes may have
been in contact with a person suffering from a Category 2, 3 or 4 condition of
measures to be taken, and activities to be avoided, in order to minimise the
danger of the first person contracting the condition or passing it to a third
person, or
(2) A notification under subclause (1) must be in accordance with the
directions (if any) of the Chief Health Officer published on the website of
the Ministry of Health.