The City Administrator shall be chosen on the basis of his or her executive, administrative and managerial qualifications as judged by the adequacy of his or her training and his or her successful experience in private or public administration. At the time of his or her appointment, he or she need not be a resident (elector) of the City, but during his or her tenure of office, he or she must become a resident and elector of the City within six (6) months after taking office.