From the "Zinifex Metals Sales Standard Terms & Conditions"
http://www.zinifex.com/UploadZinifexPublic/Document/Zinifex%20Sales%20Conditions.pdf
19. LME Indemnity
Without limiting any other provision of these Terms, if:
(a) the Supplier (to hedge its price risk) has contracted with a London Metal Exchange (LME) broker to take on an LME position equal in tonnage and time of delivery to the sale of goods to the Customer under a contract