The underlying purposes and policies of this purchasing manual are:
   (A)   To specify, clarify and modernize the rules governing procurement by the city;
   (B)   To ensure the fair and equitable treatment of all persons who deal with procurement system of the city;
   (C)   To foster effective broad based competition within the free enterprise system;
   (D)   To provide safeguards for the maintenance of a procurement system of quality and integrity; and
   (E)   To maximize to the fullest extent possible the purchasing value of the public funds of the city.
(1980 Code, § 13.1602)