58.—(1) Where a poll is abandoned or countermanded after postal ballot papers have been issued, by reason of the death of a candidate, the local returning officer—
(a)must not take any step or further step to open covering envelopes or deal with the contents in accordance with the provisions of this Part of this Schedule, and
(b)must, notwithstanding paragraphs 48 to 53, treat all unopened covering envelopes and the contents of those that have been opened as if they were counted ballot papers.
(2) Paragraph (1) does not apply where ballot papers for more than one election have been issued together under paragraph 29.