The director of the Department of Administrative Services shall purchase all supplies, equipment and contractual services required by the several departments and offices of the City and County, except as otherwise provided in the Administrative Code. Except in cases of emergency, the director shall not enter into any contract or issue any purchase order unless the Controller shall certify thereon that sufficient unencumbered balances are available in the proper fund to meet the payments under such purchase order or contract as these become due. The director shall have charge of the central warehouses, central storerooms, central garage and shop.
The director shall by rules and regulations approved by the Controller, designate and authorize appropriate personnel within the Department of Administrative Services to exercise the director's signature powers for purchase orders and contract.
The director shall have authority to exchange used materials, supplies and equipment to the advantage of the City and County, advertise for bids, and to sell and otherwise dispose of personal property belonging to the City and County. The director shall have authority to require the transfer of surplus property in any department to stores or to other departments.
The director shall manage all public buildings, facilities and real estate of the City and County, unless otherwise provided for in this Charter.
Additional duties and functions of the Department of Administrative Services shall be assigned the City Administrator, by ordinance or pursuant to Section 4.132.