(a) If a vacancy occurs in the office of Mayor more than one hundred days before the next primary or general election to be held within the City, a successor shall be elected at such election for the unexpired term. If a vacancy occurs less than one hundred days before the next primary or general election, a successor shall be elected at the next following primary or general election for the unexpired term. If the election to fill a vacancy is to be held at the regular Municipal election at which a Mayor would ordinarily be elected, the special election to fill the vacancy shall not be held and the person elected to the office of the Mayor at the regular Municipal election shall hold the office for the remainder of the unexpired term as well as the full term to which he or she was elected at the regular Municipal election. Candidates at special elections to fill a vacancy in the office of Mayor shall be nominated by petitions signed by at least one percent of the number of electors voting for the office of Mayor at the last preceding regular Municipal election at which a Mayor was elected. Where a successor to the Mayor is elected under this division, the President of Council shall become the Acting Mayor until the person elected at such election is qualified and assumes his duties. During the time the President of Council serves as Mayor, he or she shall not be subject to the provision of division (b) of Section 5.02 of this Charter, and shall exercise all powers, duties and functions of the office of Mayor and shall not serve as the President of Council. while the President of Council serves as the Acting Mayor, the President Pro-tempore of the Council shall serve as the presiding officer of the Council, acting in the place of the President of the Council, but the President Pro-tempore while so acting shall retain his office as a member of the Council and shall be entitled to vote on all matters before the Council. When the person elected to serve as the Mayor under this division qualifies and assumes the office of Mayor, the Acting Mayor shall return to the office and resume the powers, duties and functions as the President of the Council, and the President Pro-tempore shall cease to serve in the place of such President of Council.
(b) In the event the Mayor is temporarily absent from the City or is temporarily disabled, the President of Council shall become the Acting Mayor until the Mayor returns or the disability is removed. During the time the President of Council serves as Acting Mayor, he shall exercise all powers, duties and functions of the office of Mayor and shall not serve as the President of Council. While the President of Council serves as the Acting Mayor, the President Pro-tempore of the Council shall serve as the presiding officer of the Council, acting in the place of the President of the Council, but the President Pro-tempore while so acting shall retain his office as a member of the Council and shall be entitled to vote on all matters before the Council.