Mark Bristow taking over the leadership of Barrick Gold facilitated negotiations with Tanzania about a multibillion-dollar tax dispute that could be resolved by May, the country’s attorney general said. Barrick unit Acacia Mining has been at odds with Tanzania’s government since July 2017, when the state slapped a $190-billion tax bill on the company, saying the gold producer falsely declared bullion exports. Bristow was named Barrick chief executive officer in January, and the following month the company said it’s reached a settlement proposal with the government.