s 21 Executive Powers
(1) Such of Her Majesty’s executive powers as would otherwise be exercisable on behalf of Her Majesty by a Minister of the Crown shall, if they relate to devolved matters and are exercisable in or as regards Scotland, be exercisable on behalf of Her Majesty by a Scottish Secretary. (2) The executive powers mentioned in subsection (1) of this section include any executive power conferred on a Minister of the Crown by an enactment passed or made before the passing of this Act; and a Scottish Secretary shall perform any duty which by such an enactment is imposed on a Minister of the Crown so far as it falls to be performed in or as regards Scotland and relates to a devolved matter.