§ 7. All elections by the citizens, except for such town officers as
may by law be directed to be otherwise chosen, shall be by ballot, or by
such other method as may be prescribed by law, provided that secrecy in
voting be preserved. The legislature shall provide for identification of
voters through their signatures in all cases where personal registration
is required and shall also provide for the signatures, at the time of
voting, of all persons voting in person by ballot or voting machine,
whether or not they have registered in person, save only in cases of
illiteracy or physical disability.