(a) The intent of the legislature is that a governmental entity should take advantage of an offer for an early payment discount. A state agency shall when possible negotiate a prompt payment discount with a vendor.
(b) A governmental entity may not take an early payment discount a vendor offers unless the governmental entity makes a full payment within the discount period.

(c) If a governmental entity takes an early payment discount later, the unpaid balance accrues interest beginning on the date the discount offer expires.
(d) A state agency, when paying for the goods or service purchased under an agreement that includes a prompt or early payment discount, shall submit the necessary payment documents or information to the comptroller sufficiently in advance of the prompt or early payment deadline to allow the comptroller or the agency to pay the vendor in time to obtain the discount.