The returning officer must—
(a) remove the ballot-paper envelope from each return envelope received before the close of the poll; and
(b) record receipt of the ballot-paper envelope on the roll of voters; and
(c) separate the signed ballot-paper envelopes from the unsigned ballot-paper envelopes; and
(d) disallow the unsigned ballot-paper envelopes; and
(e) place each signed ballot-paper envelope in a sealed ballot-box.