Coordination among tax and enforcement agencies enhances oversight of government foreign purchases to prevent exchange leakage. Absence of effective interdepartmental coordination in oversight of agency commissions payable to domestic agents of foreign suppliers can facilitate leakage of foreign exchange and evasion of taxes. The Board directs that meetings of Zonal, Regional and Headquarters Coordination Committees be fully utilised to initiate and ensure coordination in cases involving large-scale purchases from foreign suppliers, so that action by one department does not run counter to that of another.