Section 90.   OATH OF OFFICE.
   Every elected officer of the city shall, before entering upon the duties of his/her office, take and subscribe an oath of office in substantially the following form: “I do solemnly swear (or affirm) to support the constitution of the United States and of this state, and to discharge faithfully the duties devolving upon me as (mayor, or council member) of this city to the best of my judgment and ability.”