Bloomberg reports Malaysia Smelting Corp., the world’s third-biggest tin producer, may decide to halt mineral purchases from Central Africa.

The market news is quoted as saying:

MSC buys 15 to 20 percent of its tin ore from Central Africa, and “it will no longer be possible to both continue with those purchases and satisfy the requirements” of the new auditing rules, ITRI said. Chua Cheong Yong, an MSC spokesman, didn’t answer calls to his mobile phone or respond to an e-mail requesting comment sent outside normal business hours.

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