The mayor pro tempore, also known as the mayor pro tem, is the second highest elected office of the city.
(2013 Code, sec. 3.2.2.1)
(a) 
The city council shall nominate and, by majority vote, select an alderman to serve as the mayor pro tempore.
(b) 
The term of office for the mayor pro tempore shall end at the first meeting in December of each year or when filled by a vote of the city council, whichever comes later.
(c) 
During such times as the office of mayor pro tempore becomes vacant, the mayor shall designate an alderman to serve as the acting mayor pro tempore until the city council shall convene to elect a new mayor pro tempore.
(2013 Code, sec. 3.2.2.2)
(a) 
The mayor pro tempore shall have the discretionary authority and the responsibility to perform all the duties of the mayor in the absence of the mayor.
(b) 
The mayor pro tempore shall have the discretionary authority and the responsibility to perform all the duties of the mayor in the event of incapacitation of the mayor.
(c) 
The mayor pro tempore shall have the responsibility to perform all the duties of the mayor in the event the mayor refuses to perform the duties of mayor.
(2013 Code, sec. 3.2.2.3)