"Tolling agreement" is een common law term en wordt soms onvertaald gelaten. Eurlex vertaalt het met uitbestedingsovereenkomst of onderaannemingsovereenkomst en zet er daarna soms ("tolling agreement") achter.

Op basis van de contekst die je geeft, zou ik het met levering- en afnameovereenkomst vertalen, en er eventueel ("tolling agreement") aan toevoegen.

zie ook de definitie hieronder:

An agreement between two companies in which one agrees to supply a certain amount of a raw material every so often. For example, an oil refinery and a drilling company may agree that the drilling company will sell the refinery a certain number of barrels of crude oil every month so that the refinery has something to refine. Tolling agreements are relevant to supply chains; because of the tolling agreement, the refinery in the above example may be more confident that it can sell refined oil to other companies along the supply chain. Tolling agreements can therefore be mutually advantageous.