An elector for an election to the board must, after recording his or her vote—
(a) place the ballot paper in the ballot paper envelope and seal the envelope; and
(b) fill in and sign the declaration printed on the ballot paper envelope, place the envelope in the envelope addressed to the electoral commissioner (the returning envelope ) and seal the returning envelope; and
(c) send the returning envelope to the commissioner so that it reaches the commissioner not later than 12 noon on the close of poll day.