The Council shall appoint, by majority vote of all members elected thereto, an officer to the City who shall have the title of City Manager. The City Manager shall be chosen solely on the basis of executive and administrative qualifications, as judged by the adequacy of training and experience. At the time of appointment the City Manager need not be a resident of the city or state, but during tenure of office the City Manager shall reside in the municipality. No council member shall be eligible for appointment as City Manager during the term for which elected, or for two years thereafter.