MINISTRY OF FOOD Inside the back cover of your present Ration Book you will find a detachable postcard headed 'Reference Leaf' (shown above). Fill in the required particulars carefully. Cut out the whole postcard, address it to your home Food Office (see Note 3 below), and post it, without a stamp, as early as possible before Saturday, June 1st. You must write your National Registration Identity Number at the bottom left-hand corner of the postcard. Copy the letters and figures very carefully from your Identity Card.