(1) Without prejudice to section 6, section 11 or 13 or, as appropriate, both these sections shall not apply, as respects a person employed in shift work, each time he or she changes shift and cannot avail himself or herself of the rest period referred to in section 11 or 13 or, as the case may be, both those sections.
(2) Without prejudice to section 6, sections 11 and 13 shall not apply to a person employed in an activity (other than such activity as may be prescribed) consisting of periods of work spread out over the day.
(3) Subject to subsection (4), the Minister may by regulations exempt from the application of section 11, 12, 13, 16 or 17 any activity referred to in paragraph 2, point 2.1. of Article 17 of the Council Directive, or any specified class or classes of such activity, and regulations under this subsection may, without prejudice to section 6, provide that any such exemption shall not have effect save to the extent that specified conditions are complied with.
(4) Where
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