(1) Any appointment made or authorisation given by the Commissioner under section 13 of the Police Act 1958 that is in force immediately before the commencement of this Act and that could have been made or given under section 63 of this Act continues according to its tenor as if—
(a) it had been made under section 63; and
(b) section 63 had been in force when the appointment or authorisation was made or given.
(2) Nothing in this section limits the Interpretation Act 1999.