27. After examining all of the inner envelopes, the secretary shall open those found correct and shall remove the ballot papers.
He shall reject any ballot paper:(1) that bears more marks than the number of offices to be filled;
(2) that has not been certified by the secretary or has not been furnished by him;
(3) that bears a mark by which the elector could be identified;
(4) that has been marked elsewhere than in the boxes provided for voting;
(5) that has not been marked;
(6) on which the elector voted in a manner other than that provided in section 71 of the Professional Code (chapter C-26);
(7) that has been damaged, soiled or altered.