All time-period Billing for Lending is done through the Billing Manager. Per-Item billing for Lending can still be processed in the client.
Through the Customization Manager, you can enable or disable ILLiad's billing functions for Lending. Billing for Lending Requests (BillingActiveLending) must be turned on in the Customization Manager for any Billing processes to be possible. If Billing is turned off, the Billing icon on the Request Form ribbon, the Billing Account field will be greyed out and inactive, and the Add Billing Charges Form will not appear.