An instrument or document -
(a) that -
(i) is made or issued under a provision of the Principal Act that is amended by this Act, or
(ii) relates to such a provision and is continued in force by section 312 of the Principal Act as if made or issued under that Act,
and
(b) that is in force immediately before the commencement of the amendment,
shall continue in force as if made or issued under the provision as so amended.