The term defense stock includes defense articles on hand which are available for prompt delivery. It also includes defense articles under contract and on order that would be available for delivery within a reasonable time from the date of order by an eligible foreign government or international organization without increasing outstanding contracts or entering into new contracts. Any orders received from an eligible foreign government or international organization which cannot be filled in this manner fall within the provisions of section 22, Arms Export Control Act, which requires such orders to be filled under new procurement contracts.