(a) The committee, with the assistance of the purchasing agent, shall establish a purchasing system for the county.

(b) Such system shall provide, among other procedures, the following:

(1) Review of all contracts or purchases for biddable supplies, materials, equipment, and other needs of the county, shall be made by the purchasing agent;

(2) No purchase or contract shall be made when the bid prices exceed the current market price for the same merchandise or service;

(3) Purchases and contracts shall be awarded based on the lowest and best bid;

(4) Specifications development shall be made by the department, agency or official to receive the merchandise, construction or service;

(5) The purchasing agent shall:

(A) Review specifications and changes to allow for maximum competition of prospective bidders;

(B) Prepare formal and informal bids;

(C) Collect sealed bids;

(D) Open bids through a procedure open to the public;

(E) Evaluate, compare and submit bids for approval by the committee, if so deemed by the committee;

(F) Issue purchase orders and contracts; and

(G) Verify receiving the merchandise or service;

(6) The director shall:

(A) Accept requisitions by the department, agency or official, and, if such supplies are not currently on hand, transmit such requisition to the purchasing agent;

(B) Verify budget appropriations before authorizing a purchase;

(C) Approve invoices for payment; and

(D) Pay invoices and obligations of the county as provided herein; and

(7) Emergency purchases, total cost bidding, blanket purchases for small orders, grouping of purchases of the various departments, and other methods for receiving the most competitive price and best bid. Emergency purchases shall be limited to needs arising that are not normally foreseeable. Emergency purchases shall not be permissible if a department or agency fails to properly plan for the need, proper purchasing procedures, and delivery time.