There shall be no primary election for municipal offices. Nominations for the office of Mayor or Councilmember shall be made by petition only, on the standard forms provided by the Montgomery County Board of Elections for the nomination of nonpartisan candidates for such offices. Petitions shall be filed with said Board of Elections at least ninety days before the day of election. Candidates for Mayor shall file petitions containing no less than 50 nor more than 100 signatures of registered voters. Candidates for Councilmember shall file petitions containing no less than 25 nor more than 50 signatures of registered voters. However, write-in Candidates shall be permitted for the office of Mayor or Councilmember in accordance with the Ohio Election laws.