Sealing of ballot boxes
42. Immediately before the commencement of the poll, the presiding officer shall–
(a)show each ballot box proposed to be used for the purposes of the poll empty to such persons, if any, as are present in the polling station, so that they may see that each box is empty;
(b)place his seal on it in such a manner as to prevent it being opened without breaking the seal;
(c)place each box in his view for the receipt of ballot papers; and
(d)keep it so sealed.