The mayor shall be the presiding officer of the council, but he/she shall not have a vote on the council; provided, however, that the mayor shall cast the deciding vote in the event of a tie vote of the council. The mayor shall be the chief executive officer of the city, and shall exercise all powers and perform all duties conferred and imposed upon him/her by this charter, the ordinances of the city, and the laws of the state. He/she shall be recognized as the official head of the city for all ceremonial purposes, by the courts for the purpose of serving civil processes, and by the governor for the purposes of military law. He/she shall study the operations of the city government and shall report to the council any neglect, dereliction of duty, or waste on the part of any officer or department of the city. In time of public danger or emergency he/she may, with the consent of the council, take command of the police, maintain order and enforce the law. In the event of a vacancy in the office of the mayor, whether by death, resignation, or any other cause, the council shall be resolution declare such vacancy to exist and shall forthwith appoint an eligible person to fill the vacancy for the unexpired term, but in the case of a recall the vacancy shall be filled in the manner provided by this charter. A president pro tempore shall be chosen who shall serve as president in the mayor's absence, and as acting mayor in case of the mayor's disability or absence from the city and shall maintain voting rights on all matters coming before the city council. In the absence of the mayor and president pro tempore, the remaining council members shall nominate a presiding officer for the meeting. This person shall maintain all voting rights of the council.