On Wednesday, BHP’s Escondida copper mine in Chile invited a powerful union to start talks for a new contract. The copper mine is the largest in the world, and last year a labor dispute ended after a month-long strike that lead to the workers’ contract being extended through July 31, 2018. Negotiations for a new contract are scheduled to begin in June, but the company wants to start early. The union ruled out the possibility of early talks in February, while they were dealing with the formation of a competing union. However, according to their website the union called for an assembly to decide whether they will accept the invitation.
See "Chile's Escondida invites union to early labor talks", Fabian Cambero, Reuters, March 14, 2018