(1) Twenty one days before the date fixed for the receipt of ballot paper under rule 6, the Returning Officer shall send to every elector by post under certificate of posting:—
(a) One ballot paper in Form 4 signed by him;
(b) A smaller blank cover with the words “Ballot Paper” printed thereon; and
(c) A large cover addressed to himself in Form— 5.
(2) The Returning Officer shall make in one copy of the electoral roll against the name of every elector to whom a ballot paper and covers have been sent. The marked copy of the electoral roll and the counterfoils of the ballot papers sent shall be sealed in a packet immediately after the date fixed for receipt of ballot papers under rule 6.