Personnel shall retire from municipal duty at the age of 65, and the day of such retirement shall be at the end of the municipal fiscal year in which their sixty-fifth birthday is reached, provided, however, that the Council may waive this provision when any of the following conditions exist:
(A) Extension of duties of each municipal year may be granted upon a determination by the city physician that an employee or official is physically able to perform his or her normal duties;
(B) That a qualified replacement is unavailable; or
(C) That such an extension is for the best interests of the city.
(1999 Code, § 13-1-16)