The United States is pushing for an overarching agreement through the Organization for Economic Cooperation and Development, a forum for advanced economies.
Mnuchin told reporters Saturday there had been "lots of productive discussions" on the subject in Washington where finance ministers were gathered for spring meetings of the World Bank and the International Monetary Fund.
He said it is "a priority from our standpoint to find an OECD solution." "We will be working together to do that and a commitment from the UK and France ... will go with an international solution," Mnuchin said.
"There is a shared desire that was clearly expressed that now we have to move forward within the OECD," he said.
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