ANGE ABOA IVORY Coast will soon require 20% of cocoa purchases by multinational companies to be fulfilled by local firms in order to reduce foreign influence on the world's largest cocoa-exporting economy, four sources have told Reuters. President Alassane Ouattara is today expected to sign an order to enforce a 2012 law under which Ivorian cocoa exporters are meant to handle at least 20% of national cocoa output. The policy has gone largely unenforced until now. Every year the six major international players have used their greater financial muscle to buy and export all of the cocoa available, while local…