The city purchasing agent, or one or more deputies appointed by the city purchasing agent, shall have the power, and it shall be his or her duty, to purchase or contract for all supplies, materials, equipment and contractual services needed by any and all departments, institutions, boards, commissions and other agencies which derive their support wholly or in part from city funds and which are hereinafter referred to as the using agencies.
(Ord. 1595 § 2)