“(1) This section applies if an Order in Council made under section 2A(8) or (9) has the effect that subparts 1 and 2 of Part 5 of Schedule 3, or subparts 3 and 4 of Part 5 of Schedule 3, apply at the same time.
“(5) If, by operation of subsection 3(a) or (b) or (4)(a) or (b), this Act no longer applies to a person carrying out an activity in subpart 1 or 3 of Part 5 of Schedule 3, or an activity listed in subpart 1 or 3 of Part 5 of Schedule 3 is repealed, then—
“(a) section 54(4) applies, with any necessary modifications, to any person who has ceased, by operation of the provision, to be a participant in respect of that activity; and
“(b) the person is not required to comply with section 59, but the chief executive may, for the purposes of section 59(2), determine that the person has ceased to carry out the activity.