A. Except as otherwise provided in this article, any supplies or contractual services needed by one or more departments or agencies of the county government shall be directly purchased or contracted for by the county purchasing agent, in accordance with rules and regulations adopted pursuant to this section.
B. The county purchasing agent, subject to the approval of the governing body of the county, shall promulgate regulations for the following purposes:
1. Prescribing the manner in which supplies shall be purchased, delivered, stored, and distributed;
2. Prescribing the dates for making requisitions and estimates, the future period which they are to cover, the form in which they shall be submitted, the manner of their authentication, and their revision by the county purchasing agent;
3. Providing for the transfer to or between county departments and agencies of supplies which are surplus with one department or agency but which may be needed by another, and for the disposal by sale, after receipt of competitive bids, of supplies which are obsolete and unusable;
4. Prescribing the amount of deposit or bond to be submitted with a bid on a contract and the amount of deposit or bond to be given for the faithful performance of a contract;
5. Prescribing the manner in which claims for supplies and contractual services delivered to the departments and agencies of the county shall be submitted, examined, approved and paid; and
6. Providing for such other matters as may be necessary to give effect to the foregoing rules and the provisions of this article.