(1)This Act may by order be extended (subject to such exceptions, adaptations and modifications, if any, as may be specified in the order) to such class of persons employed otherwise than in agriculture as may be so specified, being a class of persons whose work is done in conditions appearing to the authority by whom the order is made to be similar to those in which the work of persons employed in agriculture is done.
(2)An order under this section may be either one extending this Act in its application to Great Britain and made by the Minister of Agriculture, Fisheries and Food and the Secretary of State jointly, or one extending this Act in its application to England and Wales only and made by the said Minister, or one extending this Act in its application to Scotland only and made by the Secretary of State.
(3)An order under this section may be varied or revoked by a subsequent order thereunder made by the authority who made , the original order.
(4)The powers conferred by this section shall be exercisable by statutory instrument and no order shall be made under this section unless a draft thereof has been laid before Parliament and has been approved by resolution of each House of Parliament.