Nonactionable subsidy exemption narrowed: subsidies limited to a few manufacturers now subject to antisubsidy investigation. The amendment to section 9(3) of the Customs Tariff Act replaces clause (c) to provide that a subsidy 'has been conferred on a limited number of persons engaged in the manufacture, production or export of articles,' thereby narrowing the nonactionable subsidy exemption and making narrowly conferred subsidies subject to antisubsidy investigations.