In case of the disability or any vacancy occurring by death, resignation or removal by the board of commissioners of any city officer, the said board shall, by a majority vote of all the members thereof, appoint some suitable person to fill the unexpired term. The resignation of any city officer appointed under the provisions of this act shall be made in writing to the board of commissioners for their action thereupon. If any city officer required to be a resident of the city or of the territory within a two (2) mile radius of such city shall remove from such territorial limits such removal shall, ipso facto, vacate his or her office. The city clerk shall enter every appointment of office and the date thereof on the journal.