(a) The following ballots may not be counted:
(1) a ballot that is not provided to the voter at the polling place;
(2) two or more ballots that are folded together in a manner indicating that they were folded together when deposited in the ballot box;
(3) a write-in envelope containing a write-in vote without an attached ballot;
(4) a ballot that has not been deposited in the ballot box used for the deposit of marked ballots; or
(5) a provisional ballot that is not accepted under Subchapter B.
(b) If a ballot is unnumbered or the signature of the presiding judge does not appear on the back of a ballot, the presiding judge shall examine it to determine whether the ballot is not to be counted under Subsection (a)(1).
(c) If a ballot is not counted, an election officer shall indicate on the back of the ballot the reason for not counting it.