These rules apply to both manual and electronic counting of ballot papers and state the reasons why a ballot should be rejected if it does not bear the official marks, if votes are given for more than one candidate or party, if anything on the paper can identify the voter, or if they are unmarked or void for uncertainty.
In practice, it is easier for law enforcement to obtain most private communications and other electronic content under the SCA than to obtain a warrant for more traditional correspondence or papers.