The holdings view page in a request will show all libraries that have a holding on the particular item that is being request. Only if they have updated their supplier status to "Yes", meaning they are a supplier for Tipasa and WorldShare ILL, will you be able to select them as a possible lender for your requested item.
If they have not updated this status, in the Supplier column a dash (-) will be presented. This means that they are currently not a supplier for Interlibrary Loan.
For more information on the Policies Directory, please see Manage policies.