The bidding process set forth in this Article shall be utilized for all purchases not designated as eligible for purchases under petty cash, Open Market Purchase or small purchase in the Procurement Policy; provided, however, that the bidding process set forth in this Part may be supplemented by the Procurement Policy. Informal purchases (petty cash, Open Market Purchase and small purchases) shall be governed solely by the Procurement Policy; the Procurement Policy shall also designate the process for determining which bidding process will be required for all Procurements. (16-13, Amended, 12/01/2016, and Restated; 13-04, Added, 11/21/2013)