In every election held in this state, the voter shall sign his or her name on one of the poll lists or lists of persons who vote in the election, required by law to be maintained at each voting place; and no person shall record on this list the name of any voter for him or her, except where the voter, because of a physical disability, is unable to write his or her own name on the poll list; in which case an election official shall write the name of such voter on the list and shall sign his or her own name on the poll list on the same line with the name of the voter. If the voter is unable to sign his or her name because of illiteracy, his or her name shall be written for him or her and the voter shall make his or her mark upon the poll list, in the presence of any of the election officials, and the election official witnessing the act shall record his or her name, as witness, on the same line with the name of the voter.