How do I know which vendors are required?

On our website, under Contracted Suppliers, you will see the required commodities to which we have established university-wide contracts through bid or consortia under the "required" section. Some are required by the state. Some are required through cross-departmental bid-awarded contracts. We found these commodities are the most sought purchases and were strategically sourced. The vendors within the required commodities are the only contracts that must be used.