Clause 19

Every ballot box shall be so constructed that the ballot papers can be introduced therein but cannot be withdrawn therefrom unless the box is unlocked.

The presiding officer at a polling station immediately before the commencement of the voting, shall show each ballot box to be used at the commencement of the voting empty to such persons, if any, as may be present in such station so that they may see that it is empty, and shall then lock it up and place his seal upon it in such manner as to prevent it being opened without breaking such seal, and shall place it in his view for the receipt of ballot papers and keep it so locked and sealed.

The provisions of subsection (2) of this section shall apply to every ballot box used during a referendum and it shall be sufficient compliance with those provisions if a ballot box is shown, locked up and sealed as aforesaid, before it is used.