Read MoreThe cap, which stops countries paying more than $60 a barrel, is due to come into force on Monday.The cap, which stops countries paying more than $60 a barrel, is due to come into force on Monday.
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Read MoreThe cap, which stops countries paying more than $60 a barrel, is due to come into force on Monday.The cap, which stops countries paying more than $60 a barrel, is due to come into force on Monday.