193. The ballot papers shall be printed by reversing process so that, on the obverse, the indications and the circles provided for the affixing of the elector’s mark appear in white or light colour surrounded by black or dark colour.
The ballot papers used for the election of the mayor may be of a colour other than that of the ballot papers used for the election of the councillors. In addition, the ballot papers used for the election of the councillors may vary for each numbered office.