90.—(1) The Minister may, at anytime when occasion appears to require, direct that all or so many reservists as he thinks necessary be called out in aid of the civil power in the maintenance or restoration of the public peace.

(2) Whenever a direction is given by the Minister under this section, a notice shall be served on every reservist to whom the direction relates requiring him to attend at a time and place specified in such notice, and such reservist shall after that time, for the purposes of this Act, stand called out in aid of the civil power and remain called out in aid of the civil power until the prescribed military authority directs his release.