Selecting the Allow checkbox gives the user full access to the following Vendor Contract options. If nothing is selected for the option, the user will not have access.
Selecting ALLOW gives the selected user the ability to view and edit any vendor contract by granting them access to Maintenance Tab >> Vendor Contracts.
Selecting ALLOW gives the selected user the ability to view and edit any vendor contract override codes by granting them access to Maintenance Tab >> Vendor Contract Override Codes.