(a) The comptroller may collect a rebate from a vendor under a contract listed on a schedule developed under this subchapter.
(b) The comptroller shall notify a state agency purchasing a good or service through a contract listed on a schedule developed under this subchapter of the percentage used to calculate the rebate authorized under Subsection (a).
(c) If a purchase resulting in a rebate under this section is made in whole or in part with federal funds, the purchasing state agency shall ensure that, to the extent the purchase was made with federal funds, the appropriate portion of the rebate is reported to the appropriate federal funding agency.