Except and unless relatives by blood or marriage of the Mayor, any Councilman, or the City Manager, within the second degree of consanguinity or affinity, are bona fide appointive officers or employees of the City at the time of election of such officers or appointment of such City Manager, such relatives shall be disqualified from holding any appointive office or from being employed by the City, during the term for which such Mayor or Councilman was elected, or during the tenure of office of such City Manager. If the status of relationship between any employee of the City and any officer of the City changes to a relationship prohibited hereby following the employment of such person or election or appointment of such officer, the provisions of this section shall not apply.