If any person elected to the office of councilman does not qualify within the required time he shall be a vacancy in the office of councilman occurring by reason of failure or refusal to qualify, resignation, death, removal from the city, removal from office, or becoming mayor by reason of being president of the council when a vacancy occurs in the office of mayor, the mayor shall appoint, with the consent of a majority of the remaining councilmen, some suitable elector of the city to fill the vacancy until the expiration of the term of such office. In case of a vacancy in the office of mayor occurring by reason of resignation, death, removal from office, removal from the city, or refusal or failure to qualify, the president of the council, or in the case of the mayor-elect’s refusal or failure to qualify, the new president to the council, shall become mayor until the expiration of the term, and a vacancy shall occur in the office of the councilman becoming mayor. (C.O. No. 1, Sec. 2; Code 2000)