21.—(1) Each postal ballot paper issued shall be stamped with the official mark.
(2) The number of the elector as stated in the register shall be marked on the counterfoil attached to the ballot paper.
(3) A mark shall be placed in the absent voters list or the list of postal proxies against the number of the elector to denote that a ballot paper has been issued to the elector or his proxy, but without showing the particular ballot paper issued.
(4) The number of a postal ballot paper shall be marked on the declaration of identity sent with that paper.
(5) The address to which the postal ballot paper, declaration of identity and the envelopes referred to in paragraph 23 below are to be sent is—
(a)in the case of an elector, the address shown in the absent voter’s list;
(b)in the case of a proxy, the address shown in the list of postal proxies.