(1) The Minister may, by legislative instrument, declare duty to be warlike service for the purposes of this Act.
(2) A declaration under subsection (1):
(a) must be in writing; and
(b) may take effect retrospectively; and
(c) may relate to duty even if it was performed before the commencement of this section.
(3) The Minister may, by legislative instrument, revoke or vary a declaration under subsection (1).
(4) An instrument under subsection (3) may take effect retrospectively, except in so far as it results in duty ceasing to be warlike service for the purposes of this Act.