(a) the day specified in the instrument for the purposes of the commencement
of the instrument or provision; or
(b) the day and time specified in the instrument for the purposes of the
commencement of the instrument or provision; or
(c) the day, or day and time, of the commencement of an Act, or of a
provision of an Act, or of the occurrence of an event, that is
specified in the instrument for the purposes of the commencement of
the instrument or provision; or
(d) in any other casethe first moment of the day next following the
day when it is registered.
(a) the rights of a person (other than the Commonwealth or an authority of the
Commonwealth) as at the date of registration would be affected so as to
disadvantage that person; or
(b) liabilities would be imposed on a person (other than the Commonwealth
or an authority of the Commonwealth) in respect of anything done or
omitted to be done before the date of registration.