No person shall orally, by letter or otherwise, solicit, directly or indirectly, any assessment, subscription or contribution for any political purpose whatever from any person holding a position in the employ of the City; and no employee, except appointed administrative officers, of the City shall take any active part in the management or promotion of any political party or political campaign. Any person who, by himself or with others, willfully violates any of the provisions of this section shall be subject to such punishment as Council may by ordinance prescribe; and such person shall, for a period of five years, be ineligible for any Municipal appointment or employment; and, if he be an officer, other than a Councilman, or an employee of the City at the time of such violation, he shall immediately forfeit the office or position he holds; and such violation by a Councilman shall constitute official misconduct.