The nomination petition for each candidate for Mayor shall be signed by at least fifty (50) registered electors. The nomination petition for each candidate for the Council to be elected from a district shall be signed by at least twenty (20) registered electors from such district. Petitions shall be filed with the City Clerk as provided by ordinance. (Amended at election held Nov. 2, 2004; amended at election held Nov. 6, 1990)