CODELCO on an association agreement with Rio Tinto to develop a lithium exploration and exploitation project in the Maricunga salt flat, for USD900 million. Additionally, on a collaboration agreement with Rio Tinto aimed at accelerating the potential development of the mining district around Nuevo Cobre in the Atacama Region, Chile, The advice included the drafting and negotiation of a shareholders' agreement, its annexes, and other required documents.